Frame size chart for mountain bikes

This chart will recommend a mountain bike frame size based on your leg length measurement.
You can also try our Bike Size Calculator.
Mountain Bike Size Chart

Measuring Your Leg Length/Inseam I

Take off your shoes. Stand against the wall. Place your feet apart. Put a book between your legs, with it's spine firmly up against your crotch. You should feel as if you are seated on a bicycle saddle. Have someone measure from the floor to the spine of the book.

Frame Measurement ST

Mountain bikes are measured from the center of the crank (or bottom bracket) to the top of the seat tube. Mountain bike frame sizing is generally measured in inches (in).

Inseam (in/cm) Seat Tube (in) Crank Size (mm) Size
25.0/64 13 170 XXS
25.5/65 13 170 XXS
26.0/66 14 170 XXS
26.5/67 14 170 XXS
27.0/69 14 170 XS
27.5/70 15 170 S
28.0/71 15 170 S
28.5/72 15 170-175 S
29.0/74 16 170-175 S
29.5/75 16 170-175 S
30.0/76 16 175 S
30.5/77 17 175 M
31.0/79 17 175 M
31.5/80 17 175 M
32.0/81 18 175 M
32.5/83 18 175 M
33.0/84 19 175 L
33.5/85 19 175-180 L
34.0/86 19 175-180 L
34.5/88 20 180 L
35.0/89 20 180 L
35.5/90 20 180 L
36.0/91 21 180 XL
36.5/93 21 180 XL
37.0/94 21 180 XL
37.5/95 22 180 XL
38.0/96 22 180 XL
Consult bicycle shop for a professional fitting!
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