These size labels come from an old french sizing standard which we ll cover in more detail in the french sizing section.
Mountain bike standard size.
Mountain bike sizing guide when buying a bike the fit is the most important factor when it comes to comfort and the more comfortable you are the more likely you are to keep riding.
Right mountain bike sizing leg inseam cm x 0 66 your frame size.
In terms of mountain bike wheels 650b is a standard 27 5 wheel and 700c is a standard 29 wheel.
Mountain bikes are generally measured in frame size inches which is the distance from the center of the crank to the top of the frame at the seat tube.
Best gravel bikes to buy.
A visual comparison of 26 27 5 and 29er wheels with tires.
Mountain bikes come in standard sizes s m l that generally correspond to your height.
Today we technically have three or four mountain bike wheel sizes in use with two dominating the scene.
If you re in between sizes it s best to err on the smaller side as more sizing accommodations can be made with a smaller frame than.
You can read about the different bike types here.
Bear in mind that road cyclocross and hybrid bike sizes tend to be 3 to 4in bigger for riders of the same height something that confuses a lot of riders when looking through bike listings.
How mountain bikes are sized.
Many bike manufacturers include size charts that list a height range for each bike size.
The original 26 wheel size is all but dead surviving only on fat bikes entry level bikes and a handful of trials dh dj bikes.