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Bike Size Charts – How To Choose The Right Bicycle Size

We all know that size matters!

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:

  • Back pain
  • Knee pain
  • 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.

Please note: When using different methods, you will get different sizes. It’s mainly because the leg inseam measure is more accurate.

Your right bike size

Related: Best Cheap Road Bikes

#1 – Simple Size Chart

Your HeightBike Frame Size
4-11" - 5'3"13 - 15 inches
5'3" - 5'7"15 - 16 inches
5'7" - 5'11"16 - 17 inches
5'11" - 6'2"17-19 inches
6'2" - 6'4"19 - 21inches
6'4" and taller21+ inches

#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

Height (ft/in)Height (cm)Leg inseam (inches)Leg inseam (cm)Suggested Frame Size (in)Suggested Wheel Size
4'10 - 5'3"147-160cm25 - 28"62-70 cm13 - 14"26"
5'4 "- 5'7"160 - 170cm25 - 30"63 - 76 cm15 - 16"26"
5'5" - 5'9"165 - 175cm26 - 31"66 - 78 cm16 - 17"27.5"
5'9" - 6'0"175 - 183cm27 - 32"68 - 81 cm17 - 18"27.5"
6'0" - 6'3"183 - 190cm28 - 33"71 - 83 cm18 - 19"29"
6'1" - 6'6"190 - 200cm29 - 34"73 - 86 cm19" +29"

*Never rely only on bike size marks from XS to XL, because they are not standardized. Read more

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:

Height (ft/in)Height (cm)Suggested Frame Size(Size)
4`10”-5`0”148-152 cm47-48 cm(XXS)
5`0″-5`3″152-160 cm49-50 cm(XS)
5`3″-5`6″160-168 cm51-52-53 cm(S)
5`6″-5`9″168-175 cm54-55 cm(M)
5`9″-6`0″175-183 cm56-57-58 cm(L)
6`0″-6`3″183-191 cm58-59-60 cm(XL)
6`3″-6`6″191-198 cm61-62-63 cm(XXL)

*Never rely only on bike size marks from XS to XL, because they are not standardized. Read more

Size Chart For Hybrid / City Bikes

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

Height (ft/in)Height (cm)Leg Inseam (in)Leg inseamFrame Size (Inches)Frame Size (Marker) *
4'10”-5'1”147-155 cm24 - 29”61 - 73 cm14"(XS)
5'1"-5'5"155-165 cm25 - 30”63 - 76 cm15"(S)
5'5"-5'9"165-175 cm26 - 31”66 - 78 cm16"(M)
5'9"-6'0"175-183 cm 27 - 32"68 - 81 cm17"(L)
6'0"-6'3"183-191 cm28 - 33"71 - 83 cm18"(XL)
6'1" - 6'6"191-198 cm29 - 34"73 - 86 cm19"(XXL)

*Never rely only on bike size marks from XS to XL, because they are not standardized. Read more

Kids’ Bike Sizes

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

AgeHeight (Inch)Height (cm)Leg Inseam (Inch)Leg Inseam (cm)Bike Tire Size
22'9" - 3'1"85-90cm
12" - 14"85 - 90cm10"
3-43'1" - 3'3"90-100cm14"-17"35-42cm12"
4-53'3" - 3'7"100-110cm16"-20"40-50cm14"
5-63'7" - 3-8"110-115cm18"-22"45-50cm16"
6-83'8" - 4'0"115-120cm20"-24"50-60cm18"
7-94'0" - 4'5"120-135cm22"-25"55-63cm20"
9-114'5" - 4'9"135-145cm24"-28"60-72cm24"
11-145'+145cm +

Related: Best mountain bikes under $500

#3 – Bike Size Calculator

Calculate your bike sizeDo you like math? I do. But I can’t say I’m good at it. You don’t need to be good at it, just follow these simple math formulas to get the right bike size:

  1. 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.
  2. 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 80 x 0.70 = 49cm

#4 – Ask Your Local Merchant

Seriously, if they want to sell more bikes, it’s their job to make things clear. I notice way too often that merchants want to sell bikes but they don’t have size guides. How is it possible? When doing research, I often ask for additional details and in most cases, they are very keen to help me (and you as well).

Ideally, what you want to find is something like this:

Bike Size information

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 consider different bike measurements, 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 Wrong Bike Size?

It seems impossible or dumb to do it, but sometimes it happens. That’s because there is little room for error when choosing the right bike size. You can try these methods, but if the bike still doesn’t feel right, just get the one that does.

Bike too smallCycling FAQ

  • 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.

For additional information, visit ilovecycling.com


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:

Bike size vs Size marked by manufacturers

Bike size markers from XS to XL

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?

If you are 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 at a 27,5″ or a 29″ mountain bike.

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

If you’re asking what size bike do I 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 in cm with 2.54.

Have a question about bike sizing? Write to us: sam (at) bikexchange (dot) com

Still not sure? Order assembly from Amazon

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