Mountain Bike Sizing

Overview /\ Buying Guide /\ Sizing /\ Types /\ Reviews /

Find your correct mountain bike size in about 5 seconds!

Mountain Bike Sizing

When buying a mountain bike, it is crucial to choose the right size. The wrong size will not only be uncomfortable but can result in serious long term effects to your back, shoulders and wrists.

If you want to know which size you need, look below! Without making it too complex, we have provided the following chart which will work well in most cases.

Mountain Bike Size Chart


Rider ParametersSuggested Mountain Bike Frame Parameters
Feet & InchesCentimetersInseam LengthCentimetersInches(Frame Size)*
4’10” – 5’2″148cm – 158cm25″ – 27″33 – 3713″ – 14″(XS)
5’2″ – 5’6″158cm – 168cm27″ – 29″38 – 4215″ – 16″(S)
5’6″ – 5′ 10″168cm – 178cm29″ – 31″43 – 4717″ – 18″(M)
5’10” – 6’1″178cm – 185cm31″ – 33″48 – 5219″ – 20″(L)
6’1″ – 6’4″185cm – 193cm33″ – 35″53 – 5721″ – 22″(XL)
6’4″ – 6’6″193cm – 198cm35″- 37″58 – 6123″ – 24″(XXL)

This sizing chart should work for every type of mountain bike type.

Please note: Some bike manufacturers may have different charts. This is because they have totally different frame designs. Always use manufacturer specific sizing charts when possible.

If you’re between two sizes, we have a suggestion:

If you’re below 5’7“, pick the smaller frame and if you are above 5’7“, pick the bigger frame. If you are still growing, always pick the bigger frame.

Hopefully, that should answer your question. If you have additional questions, read below and you might just find the answer!

What If I Got My Bike Size Wrong?

First of all, you need to determine if you actually got the wrong frame size, or if you just need to make adjustments to the handlebars, and saddle etc.

You should try making adjustments before deciding you have the wrong frame size. For example,

  1. is your saddle at the right height?
  2. Is it the right distance from the handlebars?
  3. Is it at the correct angle?
  4. Do you have right stem length and position? Those small adjustments can have a big impact on the overall feel of your bike.

There are also bike fitting services (like on Amazon or on, that you might want to use to make sure your position is correct.

If you did everything right, and the mountain bike still doesn’t feel like it is the correct size, return the bike to get the right size.

What’s The Right Mountain Bike Saddle Height?

Right Mountain Bike saddle Height

Well, there are basically two ways how you can determine the right saddle height for you. One way you can do all on your own. For this, you can tell the height is right when your feet are on the pedals, and when one pedal is in its lowest position, you have 10-15 degree bend in that knee.

For an even better result, order a bike fitting service. Through this service they measure different points on your body, and set the optimal mountain bike saddle height for you.

Make sure to order the PRO bike fitting service if you are an aggressive rider, and ride a lot!

More reading on I Love Bicycling

How To Get The Best Riding Position?

Once you have the right frame size, you can get everything else into the right position.

Sometimes the exact right size mountain bike doesn’t feel right off the bat. This is because all of our bodies are different.

For example Pete, Jeff, and Mike are all exactly 5’9” tall. However, Pete has longer arms than the other two. Mike has shorter legs than them both, and Jeff has longer legs than Mike and Peter.

This is normal.

So what they can do here is adjust the saddle, buy a different angle/length stem, or move the handlebar position a bit. These are the easiest ways to optimize a mountain bike’s size. If you don’t feel comfortable doing this, order the bike fitting service like we discussed earlier from Amazon.