trek bicycle frame size chart

Bike Size Charts – For Men, Women & Kids

Understanding what size bike you need can be tricky, and if you don’t know where to start, it can feel like trying to navigate a maze.

There are multiple frame sizes to consider, and sizing methods differ based on your riding style and preferred manufacturer.

But finding the right bike size is actually easier than it seems!

We’ve created this guide to simplify and demystify the process , answering any questions you might have.

Our bike sizing guide has already been read 10 million times , proving its effectiveness and helping riders like you make informed decisions. Join the millions who’ve found their perfect fit.

By the end, you’ll have a much clearer understanding of how to choose the perfect bike size for your needs.

Please read: Google killed this Bike Size page!

Why Trust Us?

How to get the right bike size, sizing by bike types, mountain bike size chart, road bike size chart, hybrid bike size chart, kids’ & junior’s bike size charts, how to know if a bike fits you well, frequently asked questions.

Why should you trust our bike sizing guide?

It’s simple: 10 million readers can’t be wrong. See for yourself:

Our guide has not only been read by millions trying to find their ideal bike size, but we’ve also directly assisted over 1000 individuals find their perfect fit in the comments.

With years of experience both as cyclists and helping others find their way in the cycling world, our bicycle sizing insights and tips come from real-life experience.

If you still have questions or need further guidance after reading the bike frame size charts below, feel free to reach out in the comments and we’ll help you find the perfect bike size for your height.

Choosing the right bike size is essential for comfort, efficiency, and preventing injuries.

While test riding a bike is the ideal way to gauge fit, it’s not always practical, especially with the often better deals found online compared to local bike shops.

The good news is, you DON’T NEED TO test ride a bike to ensure a good fit. 

If you know your height and inseam length, you can get the right size by using a bike size chart.

However, this is where things get slightly more complex.

Bike manufacturers may use different sizing standards, such as centimeters and inches, or sizing labels such as S, M, L, XL. Sizing methods also differ based on bike types—road, mountain, and hybrid bikes are not sized in the same way.

If you’re starting to feel overwhelmed, don’t worry. Keep reading below and we’ll make things a lot clearer.

Should You Trust S, M, L, XL Bike Size Labels?

Many manufacturers also use size labels such as XS, S, M, L, and XL. These labels are becoming more common because they simplify things, but they can sometimes be vague and misleading.

Due to the lack of standardization across brands and bike types, you should avoid relying only on bike size labels when choosing the right size. Their dimensions may vary from one brand to another.

Letter-based size labels offer a good starting point but should be cross-checked with other methods.

For example, an L-sized Trek road bike may have a 56 cm seat tube length, while a Giant’s L-sized road bike may have a 58 cm seat tube length.

Therefore, you can use these labels as a rough guide, but make sure to also refer to a bike type-specific size chart (such as the ones below) or the manufacturer’s sizing chart for the specific model you’re interested in.

What and How to Measure?

To be able to use a bike frame size chart and correctly size a bike, you need to know two measurements: height and inseam (inside leg) length.

Why does inseam length matter?

The inseam length is important to ensure you get a bike with an appropriate standover height. This is the distance from the ground to the top of the bike’s top tube.

Ideally, to prevent injury and improve comfort, there should be a one-to-two-inch clearance between your crotch and the top tube when standing over the bike.

What you’ll need:

• A tape measure
• 30 seconds of your time

Measuring your height  is super simple. All you need to do is:

• Stand straight against a wall with your feet together.
• Place a book on top of your head, making sure it’s horizontal with the floor.
• Measure the distance from the ground to the point where the book and the wall meet.

Measuring your inseam is even simpler:

• Just stand against a wall with your shoes off and feet hip-width apart.
• Measure the distance from the ground to your crotch.
• That’s it!

With these two measurements written down, you’re pretty much all set to find the perfect bike size for your height and inseam.

Adult Bikes Are Sized by the Frame

Adult bikes are primarily sized by the frame; or to be more specific, they are sized by the seat tube length .

This is the vertical distance from the center of the pedal axle (the bottom bracket) to the top of the seat tube—it’s often listed in measurements like 52 cm, 54 cm, 56 cm , or 17 inches, 19 inches, 21 inches .

While this measurement is a good starting point, it doesn’t tell us all that we need to know—it determines the height of the bike, but not its length, also known as reach.

Why Does Reach Matter?

To really dial the fit, you should also consider the bike’s reach , which refers to the horizontal distance between the bottom bracket and the head tube.

Reach tells you how far you have to stretch to reach the handlebars and is especially useful if you’re in between two sizes.

A shorter reach means you’ll be sitting more upright when you’re riding—perfect for comfort on longer rides.

A longer reach means you’ll be more stretched out on the bike—ideal if speed and aerodynamics are your priorities.

Men’s vs. Women’s Bike Sizing

In adult bike sizing, the distinction between men’s and women’s bikes often comes down to marketing rather than significant sizing and design differences.

Therefore, the bike frame size charts below are suitable for all riders , regardless of gender.

Even though some brands offer models specifically labeled for men or women, and a few brands manufacture women’s bikes only (such as Liv or Juliana), the differences compared to unisex bikes are miniscule.

Men’s and women’s bike sizes are largely similar, with only minor differences driven by marketing. Most bikes are unisex!

These often include slightly different proportions between the bike’s stack (vertical height) and reach (horizontal length), which are negligible unless you’re a professional rider.

For example, women’s models might have a shorter reach compared to the stack to accommodate what some manufacturers perceive as average body proportions.

However, as body types differ among individuals, a women-specific bike might not automatically provide a better fit for every woman. Similarly, some men might find that a women-specific model fits them better than a men’s or unisex model.

Kids’ Bike Sizing: Sized by Wheel Diameter

Unlike adult bikes which are measured by frame size, kids’ bikes are determined by wheel size , simplifying the selection process.

Wheel diameters on kids’ bikes typically range from 12 inches to 26 inches , increasing in two-inch increments. This means that a 12-inch kids’ bike has 12″ wheels, a 14-inch bike has 14″ wheels, and so on.

Manufacturers then use these wheel size measurements to provide size recommendations based on a child’s age, inseam length, or height.

For example, a 12-inch bike might be suggested for children ages 3 to 5, with specific height or inseam measurements to further dial the best fit.

Many manufacturers provide additional information such as standover height and min/max seat height , which allows parents to get a better fit by relying on the inseam length measurement.

While wheel diameter and age can give a general idea of the right bike size, incorporating inseam length in the equation is advisable for the perfect fit.

While most adult bikes are sized by the frame, specifically by the seat tube length, sizing standards can differ slightly based on bike types.

For example, road bikes are typically measured in centimeters (cm), mountain bikes are measured in inches (in), while hybrid bikes may use either of the two.

Therefore, finding the ideal fit means you should be checking out bike type-specific sizing charts for road, mountain, and hybrid bikes, such as the ones below!

In recent years, mountain bike manufacturers have moved away from the traditional method of sizing bikes by inches and seat tube lengths.

Nowadays, a more intuitive system using size labels such as S, M, L, and XL is in use, prompted by more radical modern frame designs and geometries.

In addition to that, most brands also provide detailed geometry charts where you can find important measurements such as stack, reach, tube angles, wheelbase, and so on.

Our mountain bike size chart below is a great starting point.

26-Inch vs. 27.5-Inch vs. 29-Inch Wheels

Modern mountain bikes typically come with 27.5-inch or 29-inch wheels, whereas 26-inch wheels are mostly reserved for fat-tire bikes.

The choice of wheel size directly influences the bike’s handling and performance—smaller wheels improve handling and maneuverability, whereas larger wheels enhance speed and obstacle rollover ability.

However, when considering the right fit for a mountain bike, the impact of wheel sizes is limited and more nuanced.

In general, wheel sizes should not be used as a way to gauge the right fit of a mountain bike, even though it can affect the riding experience by changing the geometry of the bike.

Wheel size is crucial for riding performance, but not as important for sizing adult bikes.

For shorter riders, smaller wheels can improve the feeling of maneuverability and control, improving the riding experience. Smaller wheels also lower the standover height, which has a positive effect on comfort and safety.

Conversely, taller riders may prefer larger 29-inch wheels for smoother handling and the ability to maintain momentum.

This is why many manufacturers often align wheel sizes with frame sizes—smaller frames come with 27.5-inch wheels, whereas larger frames come with 29-inch wheels.

What If You’re Between Two Sizes?

If you find that you’re between two sizes on our mountain bike frame size chart, there are a few things you should consider to be able to choose correctly.

• Riding style: Size up if you’re an aggressive rider or size down if you’re more timid in your approach.
• Stability vs. maneuverability: If you prioritize stability, size up; but if you prioritize maneuverability, size down.
• Approaching obstacles: If you prefer taking the harder line and going over obstacles rather than around them, size up. Otherwise, size down.
• Ape index: If your wingspan is longer than your height, size up; otherwise, size down.
• Experience and flexibility: If you are an experienced rider and have a flexible body, feel free to size up. Otherwise, size down to feel more confident.

Road bikes are typically sized in centimeters by measuring seat tube length. Most manufacturers also use the letter-based size labels.

However, with the introduction of modern frame geometries with sloping top tubes, it’s a good idea to also consider more advanced geometry measurements, such as stack and reach.

This approach offers a more precise fit, ensuring optimal performance and comfort on the road.

Below, our road bike size chart offers the perfect starting place to pinpoint your ideal frame size.

Note: This chart can also be used to find the right gravel and cyclocross bike size due to their similarity to road bikes.

If you’re between two sizes on our road bike size chart above, you’ll want to consider these factors before making the final choice:

• Riding for speed:  If you prefer faster and shorter rides and races (such as crits), choose a smaller frame.
• Riding for endurance: If you prefer long-distance riding, such as gran fondos or audaxes, choose a bigger frame.
• Ape index:  If your wingspan is longer than your height, choose a bigger frame. Otherwise, choose a smaller frame.
• Riding position:  If you prefer being more upright when riding, choose a smaller frame. Otherwise, choose a bigger frame for more aerodynamics.
• Weight and stiffness: If you want a bike that feels stiffer and lighter (e.g. for sprinting), choose a smaller frame.

Hybrid bikes blend the characteristics of road and mountain bikes, prioritizing comfort, practicality, and versatility.

Most manufacturers size hybrid bikes (including commuting and fitness bikes) using the letter-based approach (S, M, L, XL).

This makes it easy to find the right size, especially considering the fact these bikes are used for recreation and commuting, rather for performance.

Choose your ideal hybrid bike size from the chart below.

If you’re between two sizes on our chart above, here are a few things to consider:

• Ape index: If your wingspan is longer than your height, choose the larger frame size.
• Riding style: If you plan to ride for leisure or commuting, a larger frame might offer a more relaxed posture. For more sporty fitness riding, a smaller frame will provide better control and handling.
• Standover height: Make sure your inseam length is at least 1-2 inches longer than the standover height on the frame size you’re considering.

As we’ve already mentioned briefly above, kids’ bikes are sized by the wheel diameter. This makes choosing the right size a lot more straightforward.

Check out our kids’ bike size chart below to get a general idea of which sizes to consider for your child.

But remember, for the best fit, it’s a good idea to measure your child’s inseam and compare it to the bike’s standover height and seat height range.

Finding the right bike size using a sizing chart is pretty straightforward and a great start.

But how do you know if your bike actually fits you perfectly?

Here’s a quick checklist to help you easily determine if your bike fits you well.

• Standover height:  If the bike fits you well, there should be 1-2 inches of space between your crotch and the bike’s top tube. This is especially important on bikes with a horizontal top tube design. To check, stand over the bike with your feet flat on the ground and pull the handlebars up. If the front wheel can come up 1-2 inches, you’re good to go.
• Saddle height: With your foot on the pedal at its lowest point (6 o’clock), your leg should have only a slight bend in the knee. A good fit shouldn’t require the saddle to be at its maximum or minimum height setting for you to achieve this.
• Reach:  How does it feel holding the handlebars while sitting on the saddle and riding? If you feel the handlebars are too far away and you need to stretch to reach them, the bike is likely too big. However, if you feel cramped and constrained with a rounded back and shoulders, you should probably size up.
• Overall comfort:  Do you feel comfortable and confident while riding the bike? If the bike fits well, you should be able to handle and maneuver it with ease, especially when cornering and accelerating on the pedals.
• Knee position:  Finally, if the bike fits you well, your knee should not be hitting the handlebars when pedaling. Also, the front of your foot should not be hitting the front wheel when turning the handlebars. If this happens, you need to size up.

Why sizing varies among manufacturers?

Sizing varies among manufacturers because they take different approaches to frame design, geometry, and tube measurements and angles. Brands also target different audiences and intended uses, all of which leads to sizing variations. That's why similarly sized bikes might fit riders of different heights.

What size push bike do I need?

Push bikes are typically sold with 10" - 14" wheels. A 10-inch push bike will usually fit kids aged 18 months to 2 years; a 12-inch push bike will fit kids aged 2-4 years; while a 14" push bike will typically fit kids aged 3-5 years old. These are just general recommendations—for the best fit, consider your child's inseam length.

What size bike do I need for my height?

To find out what size bike you need for your height, you should consult a sizing chart for the type of bike you're interested in, such as road, mountain, or hybrid. Depending on the type, bike size charts will match your height to a corresponding frame size denoted in centimeters, inches, or general sizes (XS, S, M, L, XL).

Is a 26-inch bike for adults?

A 26-inch bike can be suitable both for adults and for kids, depending on the context. Kids' 26-inch bikes are suitable for teenagers and shorter adults. However, some adult bikes, such as touring bikes, fat bikes or electric bikes, also come with 26-inch wheels, but these have larger frames and are not suitable for children.

What height is a 26-inch bike good for?

A kids' 26-inch bike (a bike with 26-inch wheels) is typically suitable for teenagers and shorter adults who are around 5'0" to 5'3" tall. However, bikes for adults with 26-inch wheels, such as fat bikes or some electric bikes, are often available in a few frame sizes and might fit adults who are 6 feet in height and taller.

How do I know if a bike is too big or too small?

A bike is considered too big if you cannot stand over the frame with both feet flat on the ground without the top tube touching your crotch, or if you have to stretch too far forward to reach the handlebars. Conversely, it's considered too small if you feel cramped when riding, can't adjust the seat high enough, or your knees hit the handlebars when pedaling.

___ Inch bike for what size person?

To determine which bike size is suitable for a particular height range, consult a specialized bike size chart for the bike type you're interested in, such as our road, mountain, and hybrid size charts above. These charts match rider heights with appropriate bike sizes, allowing you to get a proper fit.

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Trek Bikes Size Guide

Need to know what frame size you need for your next Trek bike? Checkout the sizing chart below:

To view the latest Trek Bikes:  click here.

This chart use measurements suggested by Trek Bikes:

• Trek Remedy Size Guide Chart
• Trek Slash Size Guide Chart
• Trek Fuel EX Size Guide Chart            
• Trek Rail Size Guide Chart
• Trek Fuel EXE Size Guide Chart
• Trek Powerfly Size Guide Chart
• Trek Top Fuel Size Guide Chart
• Trek Proclaimer Size Guide Chart
• Trek Supercaliber Size Guide Chart
• Trek X-Caliber Size Guide Chart
• Trek Allant+ Size Guide Chart

 For further advice about sizing  please contact us using the form below

• "I purchased my first EMTB from MTB Monster in December, having taken advice from people I found the Cube bike I was looking for in their store. From the first phone call through to collection the staff who ever answered the phone were polite, professional, knowledgeable…." Nigel January 2024 (Google Review)
• "Bought my new Trek from MTB Monster online. Went into the showroom previous to this and the staff were friendly and helpful. Real good quality service from point of order to picking my bike up… On collection the bike was ready and looking good and the guy ran me through all I needed to know and answered my questions." Daniel May 2023 (Google Review)
• "Ordered a Cube reaction electric mountain bike from MTB Monster, Excellent service from them. Great price for the bike, communication was brilliant and it came quickly and very well packaged. Would recommend to anyone. Thanks." Arty October 2023 (Trust Pilot)
• "Couldn't be happier with the sales service from MTB Monster when buying a new bike online recently. They were quick and helpful to in answering questions about the bike, and the sales, comms and shipping process were super smooth and reassuring. Would definitely buy again and recommend to others." Russ January 2024 (Google Review)

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Bike Frame Size Chart

Trek Bike Size Charts

By bicycle type:

Trek Mountain Bike Size Chart

• Trek Road Bike Size Chart

Trek Hybrid Bike Size Chart

By bicycle model:

• Speed Concept
• Supercaliber

These charts are based upon official Trek website sizing guide for hybrid & city, MTB and road bicycles. Take the charts below as a general guide and check the sizing calculator on the Trek's website for official results.

The Trek bike size chart, taking into account both height and inseam measurements, offers cyclists a comprehensive guide to selecting the perfect bike size for their body proportions. By considering both of these factors, riders can ensure an optimal fit and maximize their comfort and performance on the bike. Height and inseam helps determine the frame size. This chart enables cyclists to find the ideal frame size, for a comfortable riding position. With the Trek bike size chart by height and inseam chart, cyclists can confidently choose a bike that suits their body measurements and enhances their cycling experience.

Most important difference in mtb frames is the frame full suspension or hardtail. Trek offers bikes from both categories and have even more mtb bike types to offer.

Trek Road Bike Sizing

Trek road bicycles are being made in four different categories, depending on the riders needs. Aero road bikes have excellent aerodynamics and they are the choice for riders who are looking for speed and performance. Lightweight road bikes are excellent climbers and all-around bicycles. Endurance road bikes are built for those riders who spend a lot of time in the saddle, their intended use is to make riders as much as comfortable as possible during the long hours of riding. Gravel road bikes are for use on gravel and dirt roads.

Hybrid, as name states, brings a mixture of a road bike and mountain bike. They tend to have narrower tires than mountain bike and usually they have a front suspension (but sometimes comes with rigid fork too). Hybrid frames falls into the specific category between road and mtb bikes. They never come with drop bar, which differs them from road bicycles. They are ok choice for commuting and excellent one for casual fitness riders.

City bikes, as their name say, are intended for urban use on paved, asphalted roads. Main use is for transport and not for recreational riding.

Trek Domane Size Chart

Trek madone size chart, trek emonda size chart, trek checkpoint size chart, trek speed concept size chart, trek marlin size chart.

For models: Marlin 2, Marlin 4, Marlin 5, Marlin 6, Marlin 7 and Marlin 8

Trek Supercaliber Size Chart

Trek slash size chart, trek dual sport size chart.

For models: Dual Sport 1, Dual Sport 2 and Dual Sport 3

Trek FX Size Chart

For models: FX 1, FX 1 Stagger, FX 1 Disc, FX 1 Disc Stagger, FX 2 Disc, FX 1 Disc Stagger, FX 3 Disc, FX 3 Disc Stagger, FX Sport 4, FX Sport 5, FX Sport 6, 7.1 FX, 7.2 FX, 7.3 FX and 7.4 FX

Your Bicycle Size Guide

Trek Bike Size Chart By Height In CM & Inches (Road Bike/MTB)

A Trek bike size guide is all you need when the search for the correct bicycle size is still on. Known to be the number 1 performance bike brand all over the globe, Trek has been stacked with powerful engineering and classy bikes.

There are many questions revolving around passionate fans of the brand with one of them being, what size Trek bike do I need?

Well, the answer is very simple. You will need to go through the charts below for a particular bike type and model you are looking for.

Trek size charts

Trek bike sizes can vary, and that can lead to more confusion among potential buyers. The below charts will help in choosing the right model according to your height and inseam.

Trek mountain bike size chart

Trek mountain bikes come in different categories and offer sizes for every individual, starting from extra small to extra large. Take a look at the tables below and select the ideal fit for yourself.

Category – Full suspension, Hardtails, Electric, Cross Country, Trail, Enduro, Downhill, Fat Bikes, and Fuel EXe (E-MTB)

Models/Series – Supercaliber, Top Fuel, X-Caliber, Procaliber, Farley, Roscoe, Marlin, Powerfly, Service, 820, Slash, Remedy, Fuel EX, and Session

Trek MTB Cross Country (820)

Trek e-mountain bike.

Models/Series – Powerfly, E-Caliber, and Rail

Trek road bike size chart

Road bikes are an essential part of the brand that caters to a wide range of audience, thanks to its diverse range of models. These Trek road bike size charts shall help you pick the right bicycle that can go a long way for an adventurous ride.

Category – Performance/Gravel

Models/Series – Madone, Emonda, and Domane

Category – Bikepacking/Cyclocross

Model/Series – 520 and 520 Grando

Models/Series – Checkpoint and Boone 6

Model Series – 1120

Trek electric road bike sizing

Models/Series – FX+, DUAL SPORT+, vEREVE+, and Allant+

Trek alpha sizing for MTB – what is it?

The old-school approach of measuring the frame size of Trek bikes is a thing of the past. With newer inventions and modern bike geometry, alpha sizing is used in place of numeric sizing on Trek mountain bikes.

Why is alpha sizing important?

1. Easier approach

Instead of using size numbers like 19.5, the sizes can be classified into S, M, ML, L, XL, and XXL. So, someone with a 17.5 size can go for the medium and a 19.5 is a large size. You don’t have to keep a tab on numbers; instead, the alphabet makes it easier.

2. Measurement based on reach

In earlier times the frame size measurement of Trek bikes was solely based on seat tube length. Things have changed, and modern mountain bike geometry focuses more on reach as of now. Hence, alpha sizing measures what matters and is a more simplified way of measuring bike size.

Trek sizing – virtual vs actual

This can puzzle you a bit as they both are somewhat similar yet there is a subtle difference. Actual size can be termed as the overall length of the seat tube from the center of the bottom bracket to the center of the top tube intersection with the centerline of the seat tube.

On the other hand, virtual sizing is the overall length of the seat tube ranging from the center of the bottom bracket to the mid-point of the imaginary horizontal top tube in which it connects with the seat tube.

If I had to give you an example, a bike might have a virtual size of 18.5 and an actual size of 17.5. This means that the bike size feels like 18.5, but in actual sense, the frame size is 17.5. It doesn’t make much of a difference as it is there only to let you know what it is (actual size) and what it looks like in size (virtual size).

People also ask

Trek 17.5 frame size – what does it mean.

A 17.5 frame size is considered an M size (Medium) in terms of alpha sizing. Any individual who is 161-172 cm or a height of 5’3.4”-5’7.7” . If you are within this height range, going for a medium size shall be the right choice.

Trek medium frame size is for what height?

A medium size frame size (17.5) is ideal for a person with a height between 5’3.4”-5’7.7 ”. In centimeters, it is ideal for those around 161 to 172 cm in height.

Trek 24-inch bike is for what age?

When it comes to children, their bikes are measured in terms of wheel size instead of the standard frame size. These kid’s bikes have a size range between 12-26 inches, depending upon the height of the kid.

As far as a 24-inch wheel size is concerned, any kid between the ages of 8-11 can go for a fun ride with it. Some of the popular 24-inch bike models are Trek Roscoe 25, Wahoo 24, Trek Precaliber 24 , etc.

Trek 26-inch bike is for what height?

A 26-inch wheel-size bike is for kids with a height of 4’9”-5’3” (146-160 cm) . Wahoo 26 is a prime example of a bike in this category.

Trek 20-inch bike is for what age?

Trek 20-inch bikes are for children between 5 to 8 years of age. Additionally, if they are within the height of 3’9”-4’6” , it should be suitable for them.

Are Trek bikes good?

Trek bikes are considered to be extremely good and solid in build. It is known to be the number 1 performance bike brand all over the globe. Having its humble beginning in the year 1976 in Waterloo, Wisconsin, it has turned into the largest bicycle manufacturer all over the world. With an array of bikes ranging from, mountain, road, electric, and kids bikes, there is a lot to choose from a mammoth list.

How much is a used Trek bike worth?

It depends on a lot of factors in terms of how old the bike is, the year of production, which model, and a lot more. However, it can be within $1000-10,000 (depending on the model and other factors) .

Where are Trek bikes made?

The majority of their bikes are manufactured in Taiwan, China, Netherlands, and Germany too.

Why are Trek bikes so expensive?

Usually, the bike brand prefers top-tier components, suspensions, and frames that are ahead of its competitors. This results in additional costs that can be seen in the price tag and also many top-end Trek bikes are custom-made with less production, leading to being more expensive.

Trek bikes are a class apart in many ways with a range of bikes on offer for its fans across the world. Choosing the right size for you can be tricky, but this is where the Trek frame size chart comes to the rescue.

Trek as a bicycle brand might be on the costly side, but they punch above its weight to provide top-class bikes for the masses. I am always someone who roots for quality, and Trek provides what I need.

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Thanks for your informative post. I really like the Trek alpha sizing for MTB because Trek frame sizes use alpha sizing rather than the usual inches or centimeters (cm), and they usually have a certain range of measurements.

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What size bike do I need? A comprehensive bike size guide

How to decode a geometry chart to find the right size bike for you

Head tube angle

Seat tube angle.

The most crucial factor when buying a bike is to make sure the frame fits. Just like how you might wear a size 10 shoe in Nike and a 10.5 in Adidas, there is no standardisation when it comes to bike frames, and sizing can vary drastically from brand to brand. Worse, trying to decode a geometry chart for some can be as hard as wrapping their heads around quantum physics.

While minor adjustments can be made with stem length and saddle setback, ultimately if a bike frame is too big or small, the amount of available adjustment won't be great enough, and it will influence the bike's handling characteristics as well as cause issues when it comes to comfort. This is especially true when riding one of the best road bikes because you will essentially maintain that same position for the duration of the ride, and if it’s wrong, you’re in for many hours of pain — the bad kind, that is.

What makes things even more complicated is that people are built differently; some people have short torsos and long legs, while others have a long torso and short legs. This means two people who are the same height might not fit on the same bike.

While we can’t offer a specific chart that will tell you exactly what size frame will be perfect for the dimensions of your body, what we can do is help to demystify the numbers on the geometry chart and show you how to use them to figure out the right size for you.

Luckily, the components on a bike do allow for a little bit of leeway. Saddles usually have around 7cm of fore-aft adjustability, stems can be swapped for shorter or longer versions with shallower or steeper angles that raise or lower the handlebars, and most of the best road handlebars can be bought in a choice of around five different widths. Cranks can be swapped for shorter or longer lengths, many seatposts are available in a couple of shapes that adjust their bend, known as 'layback', and some bikes even come with flip chips that adjust the geometry. 

However, don't think that gives you a free ride when deciding which size bike you need. Just like how a house with poor foundations will fall, if your bike's foundation - the frame - is incorrect, you're setting yourself up for a bad time. 

Bike geometry

You can trust Cyclingnews Our experts spend countless hours testing cycling tech and will always share honest, unbiased advice to help you choose. Find out more about how we test.

A geometry chart comprises measurements of almost everything to do with the frame. Some of these numbers are extremely helpful in gauging whether a frame will fit your body or not, while others can be ignored entirely. Here's a rundown of the important numbers, and what they mean. 

Top tube length and effective top tube length

When we request bikes in for review, the first figure we look at is the top tube length or, more often, the effective top tube length. This is the length from the head tube to the seat tube and is the measurement most brands base their sizing around. 

The top tube and effective top tube length can differ because of the modern compact or semi-compact geometry bikes. Old school road bikes see a completely horizontal top tube, while the top tube on most modern bikes slopes downward. This can increase the length of the physical section of tubing but does not increase the actual distance between the head- and seat tubes.

The top tube relates directly to your arm and torso length, and it is a figure that doesn’t leave a ton of leeway to be fixed. If you have a bike with a top tube that is too short or too long, small deficits can be remedied with a new stem of different length. Realistically there is about 20mm of leeway shorter or longer than a stock road bike stem, any longer or shorter, and you will drastically change the handling characteristics of your bike.

Reach is a slightly more difficult measurement to get your head around and refers to the horizontal distance from your bottom bracket to the top of the head tube.

If you were to draw a line from the centre of the bottom bracket straight up through the frame and one from the centre of the head tube back; 'reach' is the horizontal distance between the head tube and the vertical line.

Reach is the key measurement for mountain bikes as the majority of your time on the bike will be in a standing position, with your saddle well behind your body, making the length from the head tube to the seat tube somewhat irrelevant — because you’re not actually sitting on the seat.

For road riders, reach tells us exactly how far you have to ‘reach’ to grab the handlebars and is not subject to wonky measuring and sizing practices between brands. Because of this, it is one of the two key figures to determine how one bike compares to another.

For example, a Trek Emonda has a reach of 386mm in a size 54cm frame, a Specialized Tarmac SL7 has a reach of 387mm also in a size 54cm, and a Scott Addict RC has a reach of 389mm in size 54cm. While the difference is only a few millimetres, each one of these race bikes, which are supposed to be the same size, are actually a little bit different. 

Stack is the other key sizing figure which denotes the vertical distance between the bottom bracket and the centre of the head headtube — measured using the same imaginary line that we drew straight up out of the bottom bracket when we measured reach. 

The frame stack height measurement tells us how upright or aggressive a rider's position will be on the bike. Racers tend to prefer a shorter stack because it allows them to get their handlebars low to remain lower, more aerodynamic, and shift more weight over the front wheel for cornering. Endurance and beginner riders are usually better suited to taller stacks because it allows for a more upright, comfortable position. 

Small adjustments to the overall stack height can, of course, be made by using angled stems and spacers, but again, this is not unlimited.

For example, Cannondale’s endurance bike, the Synapse, has a frame stack of 570mm in size 54, while the SuperSix Evo race bike measures 554mm in the same size.

Other important measurements

When choosing the right size for you, the measurements above will be the go-to numbers, however, if you find yourself between sizes, or you want to choose between two similar-sized bikes from different manufacturers, the following measurements can help when it comes into the nuanced differences that will affect the ride feel, stability, handling and more. 

Seat tube length and standover height

Seat tube length is one of the more simple measurements on a bike and is the distance between the centre of the bottom bracket to the top of the seat tube (excluding the seatpost, which is adjustable, of course). 

In the olden days, bikes were sized based on their seat tube length because it was usually the same as the top tube length; this was before the introduction of sloping top tubes and compact frame geometries. While a select few brands, like De Rosa, still size their bikes based on seat tube length, most use the top tube length, if they haven’t opted for t-shirt style small/medium/large sizing. 

Seat tube length is still relevant, however, as it provides an insight into a bike's standover height. Too high a standover height, and your bike may leave you with a bruised undercarriage when you stop and climb off. There really isn’t such a thing as too low a standover height; modern mountain bikes are the perfect example of this. That said, as seat tube length and standover height are proportional to the rest of a bike’s geometry, it may signify the need for a bigger frame.

The head tube angle of a bike doesn’t actually tell us anything about the size of a bike, but instead provides an insight into its handling characteristics; although as with everything else, it's not the only determining factor. Fork rake, trail, stem length, handlebar width, chainstay length, and even BB height and drop all affect how a bike handles. 

A steeper head angle will be a higher number, offering sharper, more responsive handling, and delicate inputs can illicit mid-corner line changes. With the handling being so light, bikes with steep head angles can sometimes feel nervous at high speed. A slacker head angle (lower number), on the other hand, will be more stable, especially at speed, but will require a bit more gusto to change your line.

Race bikes generally see head tube angle between 72.5 and 73 degrees, endurance bikes are often between 70 and 72 degrees, and cyclocross bikes usually range from 70 to 71 degrees — of course, there are outliers in every category.

The seat tube angle is, you guessed it, the angle of the top of the seat tube, relative to the centre of the bottom bracket.

Usually, on smaller bikes, the seat tube angle will be a bit steeper as riders with shorter legs need to be closer to the BB than riders with longer legs.

On mountain bikes, seat tube angles have increased dramatically as the geometries have become more progressive to help riders maintain traction on steep and technical climbs. On the other hand, road bikes have remained relatively stable, clocking in around 74-degrees, give or take a few degrees depending on the size and style of bike. 

While the seat angle of a frame is set, adjustments can be made via a setback seat post or the fore and aft on the saddle rails. The position you’re shooting for is to have your knee directly above your pedal axle with the crank when your foot is at the three o’clock position.

Bike geometry comparison

One problem we face when buying a bike is that each brand lays out its geometry charts in a different way, and this makes comparing two bikes from two separate brands difficult. Expand that to five bikes from five brands and you can get lost in the numbers in no time. 

Thankfully, we clearly weren't alone in finding it a headache, as a few clever people have built tools that simplify bike geometry comparison. 

Our go-to choice is Geometry Geeks , where you can simply search for the bikes you wish to select, hit compare, and it will bring up a standardised table that allows you to easily see the differences between your chosen frames. Others such as Bike Insights and Velogic Fit provide a similar solution. 

So what does this all mean?

We have thrown quite a lot of general information at you here, and hopefully, you’re better equipped to decode the geometry chart of that new bike you’ve been lusting over.

But how do you take this information and figure out what size bike is right for you? Below is a basic size chart based on rider height to get you within the ballpark.

Bike size guides

Remember, that table is only providing a rough ballpark. To get a better idea of what size bike you need to choose, you should consult the size guides provided by the brand you're looking to buy. Online retailers like Competitive Cyclist, Jenson USA, and Bicycles Online also have pretty good sizing calculators that provide you with a decent starting point. However, even armed with this information, you should still only use it as a guide. The geometry charts are the true determiner of whether or not a bike will fit, and if so, how it will fit.

You will notice that we have only included effective top tube length in the sizing chart above, and have not included the t-shirt style sizing employed by some brands. This is because even among those that use small/medium/large to size their bikes, there is no standardisation. For example, a size M Giant TCR Advanced SL 0 Disc has an effective top tube length of 555mm while size M Ridley Helium SLX disc has a top tube length of 565mm — the size small has an effective top tube of 545mm. If you look at our basic size chart above, these fall into two different height categories. So if you are 5ft 9in tall, like this writer, you would ride a size M Giant and a size S Ridley.

The best way to find out if a bike fits is to go down to your local bike shop to try a few out and see what feels right. If possible, go and get a professional bike fit before you pull the trigger, or at the very least, get your local bike shop to help you choose the right size. 

If you want to maximise your comfort and efficiency, our bike fit guide explains all the areas that can be adjusted to improve your comfort. Alternatively, a professional bike fit on your own bike will help you to dial everything from your saddle height to how many spacers you need down to the millimetre. 

Now you've got the tools at your disposal, check out our guide to the best road bikes and pick the right bike for you.

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Based on the Gold Coast of Australia, Colin has written tech content for cycling publication for a decade. With hundreds of buyer's guides, reviews and how-tos published in Bike Radar, Cyclingnews, Bike Perfect and Cycling Weekly, as well as in numerous publications dedicated to his other passion, skiing. 

Colin was a key contributor to Cyclingnews between 2019 and 2021, during which time he helped build the site's tech coverage from the ground up. Nowadays he works full-time as the news and content editor of Flow MTB magazine. 

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Unleash Your Inner Geek on a Bike

What Size Trek Bike Do I Need for My Height? Find Your Perfect Fit!

Shahed Parvej

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The size of the Trek bike you need for your height depends on your specific measurements. To determine the correct size, you’ll need to measure your height and inseam.

Use an online sizing tool or refer to Trek’s bike size chart, which provides the appropriate frame size based on your height. If you fall between sizes, it’s recommended to choose the smaller size for a more comfortable and maneuverable ride.

Make sure to consider other factors such as your riding style and preferences when selecting the right Trek bike for you.

Trek Bike Size Guide

Choosing the right size Trek bike for your height is important to ensure a comfortable and efficient riding experience. Understanding Trek mountain bike sizing and road bike sizing can help you make an informed decision. Trek offers a wide range of sizes for their mountain bikes, including an XS size with increased standover height and an ML (medium-large) size.

For road bikes, you can use an online tool to determine the best size based on your height and inseam measurements. If you find yourself between sizes, it’s recommended to size down for a more aggressive riding position or size up for a more upright and comfortable riding position.

Remember to consider factors such as terrain, riding style, and personal preference when choosing the right size Trek bike for you.

How To Measure Your Height For A Trek Bike

Determining the right size Trek bike for your height is crucial to ensure a comfortable and enjoyable riding experience. To measure your height for a Trek bike, refer to the women’s mountain bike size chart. This chart provides sizing conversion and specific frame sizes for different rider heights.

Trek offers various models such as the Trek 820, Trek FX 1, Trek Domane, Trek Madone, Trek Émonda, Trek Marlin, and Trek Slash. Each model has different frame sizes suitable for different heights. Measure your height accurately and match it with the corresponding frame size on the chart.

By doing so, you can find the perfect fit and optimize your comfort and performance on a Trek bike. Whether you’re a casual rider or a seasoned cyclist, getting the right size bike is essential for a pleasurable riding experience.

Trek Hybrid Bike Sizing Guide

When it comes to determining the right size Trek bike for your height, it’s important to refer to the Trek Hybrid Bike Sizing Guide. This guide provides information on the recommended Trek frame size for different rider heights. For someone with a height range of 4’10” – 5’1″, the recommended frame size is 13 inches.

If you fall within the height range of 5’0″ – 5’6″, a frame size of 15 inches is suggested. The recommended frame size for a height range of 5’4″ – 5’10” is 17. 5 inches, and for those with a height range of 5’8″ – 6’2″, the suggested frame size is 20 inches.

By following this guide, you can ensure that you choose the right size Trek hybrid bike for your height.

Credit: www.leisurelakesbikes.com

Fit & Sizing Tips For Trek Bikes

Finding the right size Trek bike for your height is crucial for a comfortable and enjoyable riding experience. Trek offers a wide range of mountain bike sizes, including XS with increased standover height and ML (medium-large), to ensure a perfect fit for all riders.

To determine the correct size for you, use Trek’s bike size finder tool, which requires you to measure your height and inseam. If you fall between sizes, it’s recommended to choose the smaller size for a more nimble and maneuverable ride.

Remember, proper fit and sizing are important factors in maintaining good posture, maximizing power transfer, and preventing injuries. By following these fit and sizing tips for Trek bikes, you can ensure a smooth and enjoyable ride every time.

Frequently Asked Questions For What Size Trek Bike Do I Need For My Height

How tall of a bike do i need for my height.

To determine the right bike size for your height, refer to the Trek Bike Sizing Guide. It provides specific frame sizes based on your height range.

What Size Is An 18.5 Trek?

The size of an 18. 5 Trek bike is 20 inches. (9 words)

What Height Is A 26 Inch Bike For?

A 26-inch bike is suitable for individuals with a height range between 5’4″ to 5’10”.

To ensure a comfortable and enjoyable biking experience, it’s crucial to find the right size Trek bike that suits your height. Trek offers a variety of frame sizes to cater to different riders, allowing for a more customized fit. Taking into account your height and inseam measurements, you can use the online tools provided by Trek to determine the ideal size for you.

It’s important to remember that the sizing recommendations provided by Trek are a general guideline, and personal preference also plays a role. Factors such as riding style, flexibility, and intended use should also be considered when selecting the right size bike.

By choosing the correctly sized Trek bike, you can enhance your cycling performance and reduce the risk of discomfort or injury. So, take the time to find the perfect fit and enjoy your biking adventures to the fullest!

About the author

I’m Shahed Parvej, the proud owner and founder of this platform. As a passionate Bike Enthusiast, I’ve embarked on a journey to share my knowledge, experiences, and insights with fellow enthusiasts, newcomers, and everyone intrigued by the world of biking.

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Bike Size Charts – How to Choose the Right Bicycle Size

Picking the right bicycle size is one of the most important things when talking about bike fitting. There’s so much talk around this topic, which only makes it more complicated. However, we believe it’s quite simple and easy . (No, we’re not crazy!)

Some consequences of riding a bike too small or too big for you are:

• Low performance

So, let’s see how to choose the right bike size for every bicycle type. We are going to show you various methods, so you do not need to worry about getting anything wrong.

#1 – Simple Size Chart

#2 – advanced bike size chart.

There are different types of bike size charts. Let’s take a closer look at all of them.

Size Chart for Mountain Bikes

What size mountain bike do I need? Let’s see this mountain bike size chart

Size Chart For Road Bikes

What is the right road bike size for me? Well, have a look at this bike frame size chart below:

Size Chart For Hybrid / City Bikes

What’s the right hybrid bike size for me? Well, check this bike size chart:

Kids’ Bike Sizes

What size bike should I buy for my child? Take a look below at bike size chart:

Make sure to also read our detailed guides on kids’ bike sizes , how to choose a kids’ bike , and a guide on 24-inch bike sizing to learn more about the sizes and types of kids’ bikes.

#3 – Bike Size Calculator

• Measure your leg inseam.  While standing with your legs either together or apart, you need to measure the length of your leg on the inner side.
• Calculate! Mountain bikes – x 0.685 = Your frame size (in centimeters) Road bikes – x 0.70 = Your frame size (in centimeters) City bike – X 0.685 = Your frame size (in centimeters)

For example, if you are looking for the right road bike size, and your leg inseam is 70cm, the right size would be 70 x 0.70 = 49cm

#4 – Ask Your Local Merchant

As you can see, it can be quite easy to determine the right size, just by checking the suggested rider’s height. If you need a more advanced fitting, you can also learn how to measure a bike frame and consider other dimensions, such as the seat tube length, standover height, top tube length, stack, reach, head tube length, and many more. However, in most cases, you don’t need those numbers.

How to Fix a Wrong Bike Size?

If your bike does not fit perfectly, you can do a quick DIY bike fitting to solve the issue. If that doesn’t help, we recommend going to a professional bike fitter or getting a different-sized bike.

Bike too small

• Longer Seat Post – If your saddle is in its highest position, you can try to find a longer saddle post. Look for a 350mm long seat post. Just make sure it has the right diameter.
• Longer Stem – The stem plays an important role in determining your position on the bike. Also, keep in mind the angle of the stem, which plays a huge role as well.
• Saddle set-back – Saddle position is the next aspect that determines your position. Move it back and try to find a better position.

Bike too big

• Shorter seat post – Some seat posts don’t go all the way in. Therefore, you might want to cut off your current post to make it shorter or buy a shorter one.
• Saddle forward – By sliding your saddle forward, you’ll get a better reach to the handlebar. By doing that, you should feel no pain in your knees.
• Shorter stem – You might want to look for a shorter stem. Inches here and there make a big difference in the position, which can save you from buying a new bike. Definitely worth trying.

Setting the right bike saddle height

The right way to set the correct saddle height :

• Sit on the saddle, with both legs on the pedals. You can lean against the wall to do it, it is important that you are seated on the same position as you are riding.
• Place the pedal to the furthest point from the saddle.
• Stretch your leg.
• Place your heel on the pedal.

Now, in ideal, your leg should be able to spin the pedals so that there isn’t too much of an angle (saddle too low), or if the heel doesn’t touch the pedal on its lowest position (saddle too high)

• When your hips are rocking when pedaling – the saddle is too high.
• When your legs don’t stretch at least 70% of the capacity – the saddle is too low.

People Also Ask

Why you should not rely on markings from xs to xl.

The reason is simple – this bike size system is not standardized. We tested it and here are the results:

As you can see, one manufacturer’s S is another manufacturer’s M. If you are looking for an XL frame, you can easily get a frame too big, or vice versa. Never rely on markings from XS to XL, because there is no logic behind them.

What if I am between two sizes?

When you fall in between two bike sizes, it is recommended to go for a size larger when your arm span is longer than your height. This means you have longer arms that are better on a size larger frame. If your ape index is shorter than your height, then go for a size smaller. In the mountain bike world, getting a larger size bike is only better when riding in a straight line at faster speeds, while a size smaller is better for technical trails.

• Related: Between Two Bike Sizes – Which One To Choose?

If you are in between two sizes, I recommend doing the following. Take the bigger size if you are over 5’4″. If you are below that, take the smaller size. Of course, if you are still growing or you have very long legs or arms, you might want to take the larger frame.

Who are 26-inch bikes meant for?

Actually, there is no such thing as a 26-inch bike. There are bikes  with 26-inch wheels, which are suitable for heights between 5’0″ and 5’5″. Anyone taller than that might want to look for a bike with 700c, 27,5″ (Same as 650b), or a 29″ wheel bike. Read our guide on 26-inch bike sizing for more information.

What size bike do I need? How to size a bike?

If you’re asking what size bike you need, then the answer is simple. Depending on your preferred bike type , take a look above. It’s easier than you thought, all you need to do is measure your leg inseam.

How to measure my leg inseam?

Stand with your feet apart or together and measure the length from the ground to your crotch. That’s it! If needed, convert it to inches by dividing the length by 2.54 (cm).

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Sam Millers

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The ultimate guide to bike sizes: road, MTB, gravel and hybrid sizing explained

BikeRadar's beginner's guide to finding the right size bike

Dave Caudery / Our Media

Paul Norman

Establishing the correct bike size for you is one of the most important things to do when buying a new bicycle.

Although there’s a lot you can adjust on a bike so that it fits better, if you start off with a frame that’s too small or too large for you, you may be placed awkwardly and uncomfortable as you ride.

That can result in aches and pains when cycling and your bike not handling as it should, both of which can limit your enjoyment when out riding.

With that in mind, here’s everything you need to know about bike sizes – be it a mountain bike, road bike, hybrid bike, women's-specific bike or child’s bike.

Bike size chart

We’ll cover the nuances of road bike, mountain bike, hybrid bike and gravel bike sizes shortly, but here’s an overview of typical frame sizes, according to rider height.

However, body dimensions and frame layouts can vary significantly from one person and brand to the next, so seek further advice, specific to the bike you are intending to buy, before purchasing.

How do I know what size bike I need?

There are a number of ways to find your correct bike size.

1) Rider height and inside leg

The quickest method is often to look on a brand’s site.

Usually, there will be a chart with recommended bike sizes for different rider heights, so it’s comparatively easy to see where you fit.

Some brands will have an interactive size guide, where you input your height and often other details, such as inside leg length, to find your recommended size.

However, don't take a brand's size guide as gospel – it's a guide, after all, and one person's dimensions and requirements can vary from another, even if they are the same height.

Equally, if you are between sizes, you will need to decide whether to size up or size down. More on that to come.

2) Go to your local bike shop

Next up, if you’re buying a bike from a physical shop, you can ask them what size you need. Sometimes, you’ll just get eyeballed and the assistant will put you on a bike to see if you fit.

However, bike shops are getting more sophisticated, so you might get a proper sizing, where the shop staff will measure you and determine more precisely what size bike you need.

Find a good local bike shop that takes the time to ensure you’re buying the right size bike.

3) Bike fit

Finally, some shops will offer you a discounted or free bike fit as part of your purchase. This is the most sophisticated option, not only to make sure you get a frame that fits, but to have your contact points set correctly so you'll be comfortable and efficient when riding.

You may be advised to swap out components such as the stock saddle for something that better suits your sit bone anatomy or to opt for a non-standard bar width or stem length , for example.

A bike fit will also help you to determine key setup measurements, such as saddle height, which are crucial to finding a comfortable and efficient riding position. We’ll cover this in more detail later.

What if I'm between sizes?

There’s normally an overlap between frame sizes, so you’ll often have a choice of two sizes.

If you sit between two frame sizes, the common advice is to take the smaller of the two options. There’s a lot you can adjust easily on bikes, such as saddle height , saddle setback and handlebar height , to fine-tune the fit.

However, seek further advice from the bike brand or your local shop, if you're unsure.

Road bike size guide

The most common way of sizing road bikes is by seat tube length in centimetres.

However, this will be different depending on whether the frame has a sloping or a horizontal top tube, so you’ll often see 'effective' seat tube lengths quoted, based on a horizontal line between the head tube and the seatpost.

Some brands just give you S, M, L (and often XS and XL) sizes. Others, such as Colnago and Pinarello, have their own unique sizing systems.

That means you’ll need to revert to the brand’s size info, as described above, or study the road bike’s geometry chart to work out which bike size is best for you.

See our guide to road bike sizing for more detailed information.

Mountain bike size guide

When it comes to mountain bike sizing , most brands have reverted to an S, M, L (etc) sizing method for their frames.

With mountain bike seat tube lengths being highly dependent on the frame geometry and rear-suspension layout, T-shirt-style sizing provides the clearest guide.

The trend for long and slack mountain bike geometry has accentuated the difficulty in selecting a frame size based on seat tube length alone and some brands now rely on reach (the horizontal distance from the centre of the bottom bracket to the top of the head tube) to define their frame sizes.

Seat tube length is still an important consideration though, because you need to be able to get your saddle height right. If you want to fit a dropper post , a short seat tube may also mean some models won't fit.

Finally, MTB frame sizes are significantly smaller than for road bikes, so don’t try to compare your road bike and mountain bike sizing.

We’ve got a lot more info in our mountain bike sizing guide.

Mountain bike sizing, geometry and riding style

It’s a good idea to study our guide to mountain bike geometry to understand the key measurements of an MTB frame, and how they affect a bike’s handling characteristics and fit.

The type of riding your bike is designed for alters its geometry, too. If you’re riding a cross-country bike , designed for agile handling, you may want to be more stretched out, while beginners may prefer a shorter reach so that they’re more upright, with less strain placed on the hands and wrists.

Bikes designed for more aggressive riding, including the latest downcountry bikes , trail bikes and enduro bikes , will typically have a longer, slacker geometry to match, which may have a knock-on impact on finding the correct frame size.

With the trend for bikes to have slacker head tube angles, it’s important to get your position forward enough to weight the front wheel and the suspension effectively, so you don’t want a frame and seat position that sits you too far back. Again, a geometry chart is the best way to work out the best frame size for a comfortable fit.

Gravel bike size guide

Gravel bike sizing is much like road bike sizing, with most brands using the seat tube length in centimetres to size frames, though T-shirt-style sizing is, once again, also used by some brands.

In general, your position on a gravel bike will be more relaxed and upright than on a road race bike.

That’s because you need to be able to shift your weight around more off-road to balance and steer your bike over obstacles. A more upright position will also be more comfortable over uneven terrain.

Having said that, if you’re interested in gravel racing , a longer and lower position will reduce your frontal profile and potentially make you faster, and the geometry of many of the latest go-fast gravel bikes is shaped accordingly.

As when choosing a road bike, pay attention to the geometry of a gravel bike when choosing your next ride. Buying a bike that matches your riding intentions is vital.

Women’s bike size guide

Women's frame sizes can vary significantly depending on a brand's outlook on women's bikes.

Some brands, such as Liv, have women’s-specific geometry and women’s bike ranges designed from the ground up. As a result, the range of sizes on offer will also be specific to women.

Other brands, meanwhile, assert that there are more differences in body proportions among people of the same sex than there are between sexes, and label all their bikes as unisex as a result, following a 'unisex' size guide.

In the middle, you have brands that offer 'unisex' frames but with specification tweaks to cater for women.

Some brands – such as Canyon, on its women's-specced WMN road bikes – fit smaller 650b wheels to their smaller frame sizes, so that geometry and handling can be kept consistent through the range.

We’ve got a separate guide to women’s bike sizing to cover the topic in detail, including the difference between road, mountain and hybrid bike sizes for women.

Kids’ bike size guide

As with adult bikes, it’s vital to get the size correct for a child's bike.

Age range is often quoted by bike brands as a way to size kids’ bikes but, because children grow at different rates, it’s not the best way to make sure a bike will fit comfortably.

Measuring your child

Measuring your child is an important first step in choosing the right kids’ bike size.

That starts off with their inside leg measurement. You also need to measure their height.

For the majority of the best kids’ bikes , that should give you the info you need to hone in on the correct bike size.

Wheel sizes

As we cover in our kids’ bike size guide , children’s bikes are normally sold by wheel size (in inches), with sizes increasing from 12-inch balance bikes, via 14in, 16in, 20in, 24in and 26in.

What if a child is in between sizes?

It’s tempting to buy a size up so that they’ll grow into it in a few months. That’s not optimal, not least if you're teaching a child to ride a bike for the first time.

If they’re not able to ride the bike comfortably and put a foot down easily, they may feel nervous, lose confidence, and be put off riding. It’s also easier for a child to overbalance and have a fall if the bike is too large for them.

Some brands have trade-up schemes with a discount on a larger bike when they’ve grown out of their current one.

How are bike sizes measured?

Bike sizes are measured in a number of different ways and, confusingly, there’s little consistency between bike types or between brands.

Road bike sizes are typically measured in centimetres, based on the length of the seat tube (from the bottom bracket to the top tube), although as we’ll see the actual seat tube length will vary dependent on the frame geometry.

On the other hand, mountain bike frame sizes are typically measured in inches, because they originated in the US.

You can’t compare mountain bike frame sizes directly to road bike frame sizes – not just because they’re in different units of measurement, but also because the frames on mountain bikes usually have much shorter seat tubes than those found on road bikes .

To get around the difficulty of measuring frame sizes, some brands use T-shirt sizing (e.g. S, M, L) for all their bikes, based principally on rider height.

But again, this measure isn’t consistent between brands. Indeed, brands that sell both road and mountain bikes may use a different sizing convention between the two.

Children’s bikes use different sizes again, often based either on a child’s age or the bike’s wheel size.

How to find your bike's size

If you have a current bike, you can look at the frame size sticker on it to find what size it is. This will often be located on the seat tube, but might be in a more discreet location, such as under the bottom-bracket area.

If it’s a recently sold model, you should be able to find a geometry chart for your frame on your bike brand’s website.

Alternatively, you can measure your frame size yourself, as we explain in this piece on how to measure a bike frame .

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What size bike should I get?

We’ve compiled an extensive guide to bike sizing that makes figuring out the right size a whole lot easier. Below you’ll find great info on how different bikes are sized and how to find the best fit for men, women, and kids. Consulting a bike shop is always the best way to get the best fit, but this article will help you get a good idea of where you sit.

Read on for the full story or use the table of contents or navigation buttons to skip to specific sections.

Table of Contents

• Adult bike sizing vs kids bike sizing
• Women's bike sizing

Road bike sizing vs mountain bike sizing

Important info about bike size charts, when to size up or down on a road bike, mountain bike wheel size for height, when to size up or down on a mountain bike, other mountain bike size naming conventions, why mountain bike sizing varies across brands & generations, what to do if you're in between hybrid bike sizes.

• When to do if your child is in between kids bike sizes

Standover Height

Leg extension, bike sizing faqs.

Table of Contents Road Bike Size Chart Mountain Bike Size Chart Hybrid Bike Size Chart Kids Bike Size Chart Proper Bike Fit Bike Size FAQs

How do you figure out your bike size?

Bike sizing can be a bit of a pain sometimes because there isn't always one universal system of measurement that’s the same for all types of bikes and all riders.

Depending on whether you’re looking for an adult bike, a kid’s bike, a road bike, or a mountain bike, you’ll need to find out what your frame size or wheel size is. 

We always recommend heading into your local bike shop to get the best possible fit, but you can also you the size charts and information in this guide to find the size that's best for you.

Adult bike sizing vs kid bike sizing

In a nutshell, adult bikes are sized by the frame, and kids bikes are sized by the wheel.

That means that there are two completely different measurement systems between adult and kids bikes. As children grow they’ll obviously start to fit on small adult bikes, but generally, kids 12 and younger will fit on bikes that are measured by the size of the wheels.

Women’s bike sizing

While some companies offer women-specific models with designs that aim to incorporate better-fitting components, there is no substantial difference between men’s and women’s bike sizes. Both women and men can use the same adult bike size charts below to find a great fit.

To make matters a little more confusing, sizing can also vary between styles of bike or the company that makes them. For example, road bikes and mountain bikes will often use different numbers to designate sizes.

Without going into too much detail, bike size used to be determined by measuring specific parts of the bike, like the seat tube. However, over time manufacturers have decided to update their measurement system since bike geometries have changed considerably. The goal was actually to make it easier for people, but since some companies still stick with the old systems, it can be a bit puzzling.

In the sections below we have broken down a few size charts for road bikes, mountain bikes, hybrid bikes, and kids bikes. It’s important to note that there is no single bike size chart that is universal to all brands or styles. Many bike manufacturers differ slightly in their sizing, but the charts below will give you a good idea of where to start.

Road Bike Size Chart

Road bikes will often use measurements in centimeters to denote frame sizes. If you’re looking at a road bike and you don’t know what size it is, start by measuring the seat tube, as that will give you a good ballpark idea.

Shop Road Bikes

Are you in between road bike sizes on our chart and unsure which way to go? Here are some points to consider:

Size up on a road bike if:

• you have long arms (your wingspan is larger than your height)

Size down on a road bike if:

• if you're mostly concerned with having a bike that's lighter and stiffer (sprinters)
• if you prefer an upright riding position

Mountain Bike Size Chart

Mountain bikes will either be measured in inches or, more likely, in a consumer-friendly Small/Medium/Large hierarchy. Newer mountain bikes can be tough to size without the help of a sticker or stamp on the frame, as geometries have changed so much in recent years that measuring tubes won’t typically give you very good insights.

Shop Mountain Bikes

When choosing the wheel size for your next mountain bike, you'll want to take your height and your preferred riding style into account. It's true that smaller riders often feel more in control on smaller wheels, but depending on your level of experience and the desired ride characteristics, that may or may not be the best way to go for your specific goals. 

If you're a beginner, go with the first option on the suggested wheel size portion of the above chart. If you're an advanced rider, you might consider the other listed option and decide which wheel size will suit your riding style best.

As a rule of thumb, larger wheels have faster top speeds and roll over obstacles easier, while smaller wheels are more maneuverable and "playful". If your trail priorities are speed and efficiency, go with a larger wheel size. If your priorities are agility and playfulness, you might really enjoy a smaller wheel size.

Trek recommends riders go with the largest wheel size they can comfortable handle. We'd add to that by saying the best way to get a feel for what's comfortable for you is to come test ride a bike!

Are you in between mountain bike sizes on our chart and unsure which way to go? Here are some points to consider:

Size up on a mountain bike if:

• you're a more aggressive rider who appreciates a longer reach
• you prefer stability on descents to maneuverability
• you like to ride over and through obstacles rather than around them
• your wing span is greater than your height
• you are flexible and better at maneuvering your body to adjust to terrain

Size down on a mountain bike if:

• you prefer to ride more upright
• you riding style is more conservative than aggressive
• you prefer maneuverability over monster truck-like plowing power
• you are less flexible and tend to ride in a similar position

It's important to point out again that not all manufacturers use the same frame size naming conventions. Some brands prefer to "simplify" their sizing to numbers from 1 - 6 (instead of XS - XL) for example. The thing to keep in mind is that not all brands are sized the same, and it's important to look at the size charts provided by the brand you're looking at, as well as the bike's geometry chart, in order to get the best fit.

In the early days of mountain biking, we used to size MTBs by the lengths of their seat tubes, as that would give someone a pretty good idea of what the standover height for a bike would be. That worked for a while, when frame design was relatively straightforward with top tubes and geometry that were more similar to road bikes.

As mountain bike design evolved, manufacturers were able to find more capable performance with different tube lengths and angles. With longer, more sloped top tubes and dropper post-ready designs (and more variations across brands), the seat tube is no longer the best way to approximate a bike's size. This paved the way for brands to start their own sizing methods.

Hybrid Bike Size Chart

Hybrid bikes like commuters and fitness bikes are great all-arounders that are extremely versatile and often very affordable. Most hybrid bikes use a Small/Medium/Large measurement system, but you might find a few companies who still use inches as the size denotation.

Shop Hybrid Bikes

Go with the larger size if:

• you have long arms (an arm span that's longer than your height) or long legs
• the larger size has larger wheels and you prefer larger wheels

Go with the smaller size if:

• you have a longer torso but an average or shorter arm span/inseam
• you have bad hips or a bad back or other mobility issues

Kids Bike Size Chart

As we stated above, kids bikes are measured by the size of their wheels, and it’s much more straightforward than adult sizing. A 12-inch bike has 12-inch wheels, a 16-inch bike has 16-inch wheels, and so on. Here is a great general kids bike size chart to get started, but it’s always best to have your child try a bike before you buy it.

What to do if your child is in between kids bike sizes

Go for the larger size if:

• they feel confident on the bigger size
• they're getting into racing or biking as a sport

Go for the smaller size if:

• they're less confident riders

It's almost always better to size up with kids bikes, but only if they can actually handle the larger size. Kids grow up fast, and as a parent you'll want to try to give them a bike that they can ride for at least a few years, not just one.

There are some exceptions, though. Go too big and they may not be able to control the bike, which is more dangerous and certainly less fun. Kids will become better riders when they're riding a bike they feel confident on.

How to check if a bike is the right size

Let’s say you’re standing in front of a bike that you’re interested in buying and you even know what size bike it is. According to all the size charts, the bike should be about right, but how do you know for sure? And what if you’re right on the line between two sizes? Read on to learn some of the most important things to consider when looking for the perfect fit.

Important:  getting the right fit on a bike is just as important as choosing the right size frame. If you're feeling unsure or experience pain when you ride, you should consider brining your bike to a shop. The Bike Shoppe can help! Explore our bike fitting services .

Standover height is essentially the distance between the top tube and the ground at the point where you stand over the bar. This is an important measurement to get right because you’ll want some space between your groin and the bar when you hop off the seat. For most bikes you’ll want an inch or more of standover room for a super comfortable fit. You can easily test this by pulling the bike up until it touches your body when you’re standing. If you can pull the wheels up an inch or more, you should have plenty of space.

After you’ve made sure you have enough standover room, you’ll want to make sure your legs have the proper amount of extension. You can adjust the seat height to get the right fit, but if you’ve jacked the seatpost up to the max and your legs are still very bent when you pedal, you might need a bigger size.

Here’s how to get proper leg extension:

On the downstroke, or when the pedal is closest to the ground, you should look to have around a 15-20° bend in your knee. Depending on the person you may prefer more or less bend, but you want to avoid having your knees come up too high when you pedal, which is uncomfortable, inefficient, and bad for your joints.

Another way to check your leg extension is to put your foot on the pedal and see if you can lower your heel below the axle of the pedal on the downstroke. If you can push your heel a little further than the axle, that’s often an optimum position in terms of efficiency and comfort.

Reach is pretty much what it sounds like. Specifically, the official reach measurement is usually the horizontal distance between the bottom bracket and the head tube. More generally, it translates to how far you have to reach to grab the handlebars.

Reach is something to consider mostly when you’re an experienced rider and you’re in between two sizes. Selecting a bike with a longer reach will feel “roomier”, more stable at speed, and generally more confident on technical terrain. A shorter reach will help the bike feel more responsive, but depending on what kind of riding you do, that may or may not be what you’re after.

What size bicycle is right for my height?  

Before you think about what size bike you are, you’ll want to decide what kind of bike you want. As we state in the article above, road bikes and mountain bikes often use a different sizing system, so figure out what style you’re looking for first, then consult the charts above.

Should your feet touch the ground on a bike?   

Ideally you should be able to touch your toes to the ground when sitting on the seat, but if you can put your feet flat on the ground it often means that your seat height is too low. If your seat is too low, your knees will be overly bent when pedaling and that can cause discomfort and joint pain, not to mention it’s not a very efficient way to ride.

If you feel more comfortable with your feet flat on the ground, check out Electra bikes. They use something called Flat Foot Technology which is a frame design where the pedals are moved forward on the frame so you can get proper leg extension while pedaling but still put your feet flat on the ground when you want to.

Shop Electra Bikes

Should your legs be straight when riding a bike?

How much does a bike fitting cost.

Explore Bike Fitting Packages

Do I need a 26 or 29 bike?  

26-inch wheels were the mountain bike standard in the past, but most mid and upper tier mountain bikes you’ll see on the market today use either 29-inch wheels or the slightly smaller 27.5-inch wheels. 29ers and 27.5+ bikes have faster top speeds and roll over obstacles easier than 26-inch wheels, so if you want to ride off-road, you’ll appreciate bigger tires. 26-inch wheels are often great for kids who have graduated from their 24-inch kids bike but aren’t quite big enough to use the bigger wheels found on most adult bikes.

What size bike does a ____ year old need?

What size is a 26 inch bike.

The 26 in a 26 inch bike refers to the wheel size, so that measurement isn’t always the best way to judge how big a bike is. Some youth bikes are measured by this wheel size, but more commonly you’ll find 26-inch wheels on a variety of adult frame sizes.

Shop 26-inch bikes

Is a 26 inch bike for adults? 

In short, yes! 26-inch wheels are used on adult bikes and have been for years. That being said, most modern mountain bikes have switched to 27.5” and 29” inch wheels for their superior speed, traction, and rollover power. However, 26 inch wheels are super strong and universally available, so bike tourers often use them for traveling abroad.

Biketoworkday is supported by its audience. When you buy through our links, we may earn an affiliate commission. Learn more

Bike Sizing Guide: What Size Trek Bike Do I Need?

Written by  Gary Johnson / Fact checked by  Henry Speciale

Are you looking for a bike to buy and asking yourself “what size Trek bike do I need?”

Trek bike sizing is very straightforward and varies by type.

For example, mountain bikes follow a unique method called alpha sizing that uses designations such as small, medium, or large. Using this system, a 5’3” to 5’7” tall person can use a 17.5” frame size.

On the other hand, Trek road bike sizing takes into account the inseam length.

If you want to get on the road or hit that trail with your ideal two-wheeler, check out our sizing guides below.

Table of Contents

1. Trek Mountain Bike

2. trek road bike, 3. city & hybrid bike size chart, things you can consider before choosing a trek bike size, helpful tip, trek bicycle sizing guide.

Trek bikes are comfortable and easy to ride, making them excellent for beginners. They also come in different dimensions, so you should find one that fits you perfectly.

Whether in inches or cm, our Trek bike size chart will help you match your height with the appropriate vehicle.

Unlike other brands, Trek bikes have upgraded their MTB sizing with alpha classifications to remove guesswork for customers.

You may find that your chosen model has some and not all of the sizes in this Trek MTB size chart. In that case, branch out and look for XS and XXL options if the Trek M/L frame size doesn’t fit you.

Note that the women’s bike size chart also uses the alpha sizing guide for their line of women’s mountain bikes though the height requirement is slightly different for each size.

Did You Know

The Trek Marlin 5, which is a popular trail mountain bike, uses the alpha sizing chart, but its size is not limited to XS – XXL only! Trek also offers an XXS with 26” wheels for this MTB type.

Trek has given us 4 categories when it comes to road bicycles. These include:

• Aero – The best aerodynamics for speed and performance
• Endurance – Provides comfort perfect for long hours of riding
• Time Trial – Speed-focused bikes with unique designs
• Climbing – Lightweight bikes excellent for uphill climbing

Designed to be a mixture of road and mountain bikes, Trek hybrid bicycles are best used for casual rides and commutes.

What size bike should I get? What does “size” really mean? And what is the best way to find the correct model for yourself?

There are usually FOUR different aspects that you must consider and have a good idea about.

Riding Style

Do you want to ride your bike for fun or use it for racing and exhibition? Regardless of your budget, it is important that you consider the type of biking you want to do. Some people prefer to ride in the city, while others prefer to cycle off-road.

Trek bikes come in various sizes depending on the vehicle’s discipline, since some frames have different geometry to provide the support their riders need.

Rider Height

Most bicycle models come in different sizes for different body types so that they fit most people well.

The height of a person, when measured from head to toe, can help determine the bike size that would match them. This is because taller people have longer upper and lower extremities compared to shorter people, which means they will need different sizes of bikes in order to ride comfortably.

Inseam Length

After careful deliberation with the above two factors, the frame size is then ultimately determined by your inseams or the distance from your crotch to the bottom of your leg.

You should take this into consideration because it will determine how much room there is between your feet and handlebars when sitting on the saddle comfortably.

Practical Use /Test Ride

Last but not least, once you have chosen your bicycle size and Trek model, test out the bike with at least a short ride. This will let you assess the balance and comfort of the chosen vehicle.

Whether you ride recreationally or professionally, you cannot choose blindly. First, bikes are expensive, and second, you must buy the correct product to use it for a long time.

If you’re done with our Trek frame size chart, Trek’s online website also has a unique feature that helps you select the correct frame size. You can try their bike finder, which asks for your riding style, height, and even inseams before arriving at a recommendation.

In case you haven’t noticed, there is a lot of variation in bicycle sizing, and looking for the size I need for my height was not a walk in the park.

Well, I hope our guide answered your question about what size Trek bike do I need. Should you have any more questions, send us a message.

Read more: Choosing the Ideal Bike Size for Your Kids – Bicycle Sizing Guide.

“I ride my bike to work for years, but is that enough? Our carelessness towards our surroundings has taken a toll on the environment. And now, everyone is responsible for changes; even the most minor contribution is counted. With this hope and spirit, I started with my partner to establish Biketoworkday to help more individuals commute to their work sites on their bikes.”

Complete Bike Frame Size Chart For All Bikes ?

Every buyer wants a bike that fits, and therefore consulting the correct bike frame size chart is critical.

If the frame is too big or too small, the chances are that you’ll strain. That’s when you start complaining of backache and knee pain, and that’s not all.

You’ll also have a low-performing bike, and that sucks away the joy of cycling. So, to avoid all that, you must pick the frame size correctly.

Note that bike frames vary among different bike types.

For example, the sizing guides for road bikes and mountain bikes are different. The same goes for kids’ cycles and adults’ bicycles.

So that you can understand my drive, I’ll offer you the ultimate sizing guide (plus charts).

Bike Frame Size Chart: Your 3 Options!

Essentially, there are three methods of determining the frame size, and they are as follows:

Method 1 – Inseam Length (How to Measure Bike Frame Size Using Your Inseam)

If you want to determine the correct frame size without referring to any guide, there is no better way to do it than to use your inseam length.

The inseam length is your inside leg length, which you can determine by following these steps:

• Remove your shoes and stand straight on flat ground with your legs 6-8 inches apart
• Measure the distance between your crotch and the ground in cm to get your inseam length
• Depending on the type of bike that you want to buy, use the inseam length to calculate the frame size using the details in the table below.

If your inseam length is 78cm, for example, and you want to buy a road bike, you should look for a frame size that measures 54-55cm (78cm X 0.70).

Method 2 – General Bicycle Frame Size Chart

Below is a general bike size chart that you can use to buy any bike.

The chart looks at one important thing, and that’s your height. If you match the bike frame size with your height, the chances are that the bicycle will fit.

Note, however, that I’ve shared a range of frame sizes, which means it’s not precise. So, if you intend to be more specific, consider method 3.

Method 3 – Advanced Bicycle Frame Size Chart

This method promises a more accurate bike frame size. In this case, you’ve to pay attention to the bike type you want and then match your height with a corresponding frame.

So, it’s no longer about generalizing as bikes as road bicycles and MTBs differ in frame sizes.

Now, let’s look at the sizing guide for all these bike types.

1. Road Bike Frame Size Chart

Road bikes mostly come in two styles; sportive and racing.

Sportiv road bicycles have a shorter top tube length, while racing road bicycles have a longer top-tube length. But in recent years, there has been a rise in adventure road bikes and cyclocross.

Even though manufacturers may have different sizing guides for their road bike subtypes, most of them tend to use the sizing chart below.

So, consider it to find an ideal road bike frame size (in cm).

2. Mountain Bike Frame Size Chart

Mountain bikes are engineered for off-road cycling. So, they come in the most robust frame size.

Their frames are measured in inches and cm, and their sizes range from X-Small to XX-Large. So, your job is to match the frame size with your height, as shown in the table below.

Note, however, that since mountain bikes come with different wheel sizes (26″, 27.5″ & 29″), there could be a slight difference in the bike size.

But if you use the above chart, you’ll rarely get the size wrong.

3. Hybrid Bike Frame Size Chart

Note that hybrid bikes come in different subgroups such as:

• Comfort bikes
• Performance bikes
• Dual-sport bikes
• Sport hybrid bikes
• Commuter bikes

So, all these subtypes employ the same sizing model.

Note that most hybrid bike manufacturers measure the bikes from the seat tube top to the bottom bracket.

Other manufacturers, nevertheless, use different sizing models. The most crucial point, however, is to ensure the frame size matches your height.

Hybrid bike frames are measured both in inches and cm, just like mountain bikes, and their frame sizing guides are the same as shown in the table below.

Ensure, however, that you have at least a 2cm stand-over height whenever you buy a hybrid bike.

4. Beach Cruiser Frame Size Chart

The difference between beach cruisers and the other bikes discussed above is that they come in sizes for all ages. So, you’ll get beach cruisers for kids and adults.

For that reason, you have to consider the frame size and the wheel diameter and match them with your age or height.

If I were you, I would consider the height over the age as it’s more precise.

Here’s a reference sizing table you can use.

5. BMX Bike Frame Size Chart

BMX bikes have been known as one-frame bicycles for a long time, with only the wheel size coming in variations.

For that reason, we won’t focus on the frame size as it’s unreliable in this case. We’ll focus on the wheel size instead.

And when talking about the wheel size, you’ll mostly have to choose a 16″, 18″ or 20″ wheel.

Note, however, that some BMX nowadays come with 24-inch wheels , and a perfect illustration is the Mongoose Title Elite 24 Race BMX (View on Amazon)

For such, you’ve to see what the manufacturer recommends. For others (20 inches and below), you can use the table that follows.

6. Gravel Bike Frame Size Chart

Gravel bikes are a type of road bike, which means you can size them like regular road bikes.

Nonetheless, some gravel bike manufacturers employ gravel-specific size guides that slightly differ from traditional road bikes.

Here’s one table that most of them use.

7. Womens Bike Frame Size Chart

Women naturally have a smaller stature than men. So, their bike frames are smaller than men’s.

However, you can expect a slight difference when sizing women road bikes but no difference in MTBs and hybrid bikes.

Unlike men’s bikes, we don’t have bike frame sizes for women over 6’2″.

Below are two tables you can refer to.

Women Mountain Bike and Hybrid Bike Frame Size

Women Road Bike Frame Size

8. Kids Bike Frame Size Chart

Kids’ bikes are not sized like adult bikes. While adult bicycles are sized according to the frame size, kids’ bikes depend on the wheel size.

In that case, you have to consider the rider’s height and the inseam length.

The inseam length, in particular, gives a more conclusive bike size. But still, most manufacturers use the age to measure kids’ bikes.

If I were you, I’d consider both the rider’s age and height. But overall, the rider’s height is more accurate than the age.

It’s essential that your kid can touch the ground with both feet, and that’s where the inseam length comes into play.

Here’s a sizing table to use in that case:

9. Specialized Bike Frame Size Chart

Specialized has a unique styling guide for their trail bikes. It grades the frame sizes into six sizes, all corresponding to a specific height range.

Usually, the bigger the frame size, the more stable the trail bike is likely to be.

Here’s a table from Specialized.com that you can use for direction.

10. Trek Bike Frame Size Chart

While Trek tends to size their road bikes like regular ones, they have a different approach for their MTBs.

Trek employs an alpha sizing model, which according to them, is easy to understand. According to the alpha sizing model, MTB frames come in four sizes, as shown below.

So, you only need to pick an alpha size that matches your height.

What If You Get the Size Wrong?

As far as your cycling health and fitness are concerned, it’s best if you ride a bike that fits you.

A bike that’s extremely smaller or excessively big is a safety and health risk. Health-wise, you’ll strain your back, knees, and shoulders, and that could result in severe pain.

Safety-wise, it will not be easy to maneuver the bike safely. You are likely to struggle and could easily crash.

Overall, if you cannot stand over the bike, the bike is too big. And if you cannot bend the knees, then it’s too small.

So, what should you do in either case? Here’s my advice:

Is the bike frame too small?

Consider these possibilities:

• If the seat is low even after pulling it up, consider getting a longer seat post
• If the stem is smaller, replace it with a longer one
• Move the saddle slightly back to create more leg extension room

Is the bike frame too big?

If yes, then consider these possibilities:

• Get a shorter seat post if what you have is longer
• Swap the stem with a shorter one if that’s longer
• Tilt the saddle slightly forward to give you a more comfortable handlebar reach

How Do You Ensure You Don’t Get the Frame Size Wrong?

Though the sizing chart is essential, it doesn’t always guarantee that the bike frame will fit. So, what else can you do?

In addition to looking at the advanced bike sing chart, consider these essentials:

a) Stand-Over Height

The stand-over height refers to the vertical distance between the bike’s top tube (crossbar) and the ground. Generally, this height influences your overall cycling comfort.

So, you have to confirm that you can stand over the bike with both feet touching the ground. In that case, there should be at least a 2-inch allowance between the top tube and the crotch.

b) Saddle Height

The bike saddle is another component that has a massive bearing on your overall cycling comfort. If the bike saddle is high, you’ll have a hard time steering the bike.

Luckily, you can adjust the saddle position. So, pick a bike whose saddle height you can change.

c) The Reach

The Reach (the handlebar-to-seat distance) also determines your comfort. Note, however, that the Reach is only essential for road bikes.

It’s not only vital for riding comfort but also cycling efficiency.

You can know if the Reach is correct by looking at the axle position when you take a seat. If the axle is in front of the handlebar, the Reach is short, and if it’s behind, the Reach is long.

The good thing about the Reach is that it’s adjustable. You’ve to be careful, nonetheless, not to mess up with the bike handling.

d) Leg Extension

It’s also essential that your legs also have enough room to flex when cycling. You can do that by adjusting the saddle height.

But if the seat is at its maximum height and you cannot extend the legs, the frame size is likely small. Thus, getting a more oversized frame is advisable.

Overall, you should have a 15-20 degree knee bend to offer you the correct leg extension.

1. What Size Is A 20 Inch Bike Frame?

A 20-inch bike frame (referring to the frame size) is an adult bike that suits riders who are 6’2″-6’4″ tall.

2. What Bike Size Should I Get For My Height?

You should get a bike frame size that matches your stature. Here is a general guide you can use to match a bike frame with your height.

3. What Size Is A 56cm Frame?

A 56cm frame is a large-size road bike frame that suits 5’9″-6’0″ tall riders.

4. How Do I Find My Best Bicycle Frame Size?

The easiest way to find your bike frame size is to calculate your inseam length in cm. Once you have the value, multiply it as shown in the table below:

5. What Does A 26 Inch Bike Frame?

A 26-inch bike means that a particular bike comes with 26-inch wheels. Ordinarily, a 26-inch bike suits riders who are under 5 feet (150cm).

Note, however, that some 26-inch bikes come with much bigger frames to suit guys who are taller than 5 feet.

Closing Thought:

Now you have the ultimate bike frame size chart, or should I say charts? You can thus use them as your reference to find yourself the most comfortable and fitting bike frame.

How to Measure Bike Frame Size Trek

Last Updated on February 16, 2023 by tawhid

To measure bike frame size on a Trek, you need to know the size of the wheels and tires. You also need to know the distance from the ground to the top of the seat tube. With these two measurements, you can determine the frame size.

• To measure the frame size of a Trek bike, first identify the type of bike you have
• If you have a road bike, measure from the top of the seat tube to the center of the bottom bracket
• If you have a mountain bike, measure from the center of the bottom bracket to the top of where the seat tube intersects with 4
• Once you have this measurement, refer to Trek’s sizing chart to determine what size frame you need
• If your measurement falls between two sizes on the chart, choose the larger size for a more comfortable ride

Trek Bike Size Chart by Height

Trek Bike Size Chart by Height When it comes to finding the right sized bike, height is one of the most important factors. Trek has a great size chart that can help you find the perfect fit based on your height. Here’s a breakdown of the chart: XS/14″ – 5’0″ and under S/15″ – 5’1″ to 5’4″ M/17″ – 5’5″ to 5’8″ L/19″ – 5’9 to 6’0″ XL/21″ – 6’1 and up. Not sure which size is right for you? Here are some tips: If you’re between sizes, go with the smaller size if you want a more maneuverable bike or the larger size if you’re looking for stability. You should also take into account your riding style and what kind of bike you’re looking for. For example, if you’re mostly going to be riding on trails, a mountain bike might be a better fit than a road bike. Ultimately, it’s best to test ride different bikes before making your final decision. But using Trek’s sizing chart is a great place to start!

Trek Bike Size Chart Inches

If you’re in the market for a new Trek bike, you’ll want to make sure you get the right size. To help you out, we’ve put together this handy bike size chart. Just match up your height and inseam measurements with the appropriate frame size. Height (in) Inseam (in) Frame Size (in) 5’2″ – 5’6″ 25″ – 27″ 13″ – 15″ 5’4″ – 5’8″ 26″ – 28″ 15″ – 17″ 5’6″ – 5’10” 27″ – 29″ 17″”- 19″” Now that you know what size frame you need, it’s time to start shopping! Trek offers a wide range of bikes for all kinds of riders. Whether you’re looking for a mountain bike to tackle trails or a road bike for racing, we’ve got just what you need. So get out there and explore your world on two wheels!

17.5 Bike Frame for What Height

When it comes to bike frames, size really does matter. If you’re looking for a 17.5 frame, that means you need a bike that’s specifically designed for riders who are between 5’7″ and 5’9″ tall. This is the most popular size for road bikes, and it’s also a good choice for mountain biking and hybrid riding. The big advantage of choosing a 17.5 frame is that it offers the perfect blend of comfort and performance. You’ll be able to ride longer distances without getting fatigued, but you’ll still have plenty of power when you need it on hills or during sprints. And because this size is so popular, you’ll have no trouble finding accessories and components that are compatible with your bike. If you’re not sure if a 17.5 frame is right for you, always err on the side of caution and go up one size rather than down. It’s much easier to make adjustments to a bike that’s too big than one that’s too small, so better to be safe than sorry!

Trek Medium Frame Size

If you’re looking for a new bike and aren’t sure what size frame to get, never fear! We’re here to help. In this blog post, we’ll be discussing medium frames in more detail, specifically for Trek bikes. Keep reading to learn more about whether a medium frame is the right choice for you. When it comes to choosing a bike frame size, there are a few things you need to take into account. First, consider your height. If you’re on the taller side, a medium frame might be a good option for you. But if you’re shorter, you might want to go with a smaller frame. It’s all about finding what’s comfortable for YOU. Another thing to keep in mind is the type of riding you’ll be doing. If you plan on doing mostly road biking, then a lighter frame is usually best. But if you’re interested in mountain biking or other off-road activities, then a heavier duty frame might be necessary. Again, it all comes down to personal preference and what works best for YOU and your riding style. So there you have it! A few things to think about when deciding if a medium frame size is right for you. As always, we suggest coming into our store and trying out different bikes until you find the perfect fit!

Credit: www.leisurelakesbikes.com

Where Do I Find Frame Size on Trek Bike?

If you’re looking for the frame size on your Trek bike, there are a few places you can look. The first is on the bike itself. There should be a sticker somewhere on the frame that lists the size. If you can’t find it there, you can also look in the owner’s manual. Finally, if you still can’t find it, you can contact Trek customer service and they’ll be able to help you out.

How Do I Know My Bike Frame Size?

When it comes to finding the right size bike frame, there are a few things you need to take into account. First, your height and inseam measurement will be the biggest factor in determining what size bike frame you need. You can find your height and inseam measurements by standing against a wall barefoot with a book held between your legs, flush against your crotch. Measure from the floor to the top of the book, then measure from the top of the book to the ground again. These two numbers added together will give you your inseam measurement. Once you have these numbers, you can consult a bike sizing chart to find out what size frame will work best for you. Another thing to consider when choosing a bike frame size is whether you want a road bike or a mountain bike. Road bikes tend to have smaller frames than mountain bikes because they’re designed for speed and efficiency on paved surfaces. Mountain bikes, on the other hand, are built for rugged off-road riding and typically have larger frames that can accommodate wider tires. If you’re not sure which type of bike is right for you, it’s always best to consult with a knowledgeable salesperson at your local bicycle shop. Keep in mind that even if you choose the perfect sized frame based on your height and inseam measurements, it’s still possible to end up with a bike that’s too big or too small. That’s why it’s important to test ride any bike before you make a purchase. Pay attention to how comfortable you feel on thebike and whether or notyou can easily reach all the controls without havingto strain yourself. If everything feels good, thenyou’ve found yourselfthe perfect sized frame!

What Size Trek Bike for My Height?

When deciding on what size Trek bike to buy, your height is the most important factor to consider. Trek has a wide range of bikes that come in different frame sizes, so you’ll need to know your height in order to find the right bike for you. If you’re on the taller side, you may want to consider a Trek bike with a larger frame. For example, if you’re over 6 feet tall, you might feel more comfortable on a Trek Domane SLR 9 or Madone 9.5. If you’re closer to 5 feet tall, a smaller frame like the Trek Emonda ALR 4 or Procaliber 9.9 might be better suited for you. In general, it’s always best to err on the side of caution and go with a larger frame if you’re unsure. You can always make adjustments with the seat and handlebars to make it more comfortable for your specific height. And remember, if all else fails, there’s always the option of customizing your own Trek bike!

What Size is a 17.5 Bike Frame?

When it comes to bike frame size, the number 17.5 refers to the length of the seat tube. This measurement is taken from the center of the bottom bracket to the top of the seat tube. The average 17.5 inch bike frame will have a top tube that is also 17.5 inches long. However, some manufacturers make bikes with slightly longer or shorter top tubes. For example, a company like Specialized might make a 17.5 inch bike frame with an 18 inch top tube. The rest of the dimensions on a 17.5 inch bike frame will vary depending on the type of bike and manufacturer. For instance, mountain bikes tend to have longer chainstays than road bikes. And within each category, there can be even more variation between brands. So it’s important to look at all of the measurements when you’re trying to determine what size bike frame you need. Here are some general guidelines for sizing a bike frame: – If you’re between 4’11” and 5’3″, you’ll probably need a 13-15 inch frame – If you’re between 5’3″ and 5’7″, you’ll probably need a 15-17 inch frame – If you’re between 5’7″ and 5’11”, you’ll probably need a 17-19 inch frame

Bike sizing – Trek Superfly – what frame size AND GEOMETRY to choose?

To conclude, bike frame size is an important measurement to take into account when purchasing a bicycle. By following the instructions in this blog post, you can easily measure your own bike frame size at home. Additionally, it is important to keep in mind that different brands often have their own sizing charts, so be sure to consult those before making your final purchase.

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