Mountain fit
Mountain Bike Size Chart
Mountain bike sizing starts with height, then shifts quickly to reach, standover, wheel size, and how much room you want to move on technical trails.
Enter your measurements to see your recommended size, backup size, confidence, and why it fits.
Sizing notes
Read the chart, then check the bike.
Prioritize handling
If you are between mountain sizes, the smaller frame usually feels easier to move around; the larger frame feels calmer at speed.
Check wheel size
Many smaller MTB frames use 27.5 inch wheels while medium and larger frames use 29 inch wheels. That can change standover more than the size label suggests.
Use reach as the tie-breaker
A frame can clear your inseam and still feel too long. Compare reach against a bike you already ride well when possible.
Mountain bike size chart by height
Size
S
Height
158-169 cm
Inseam: 71-77 cm
Size
M
Height
167-178 cm
Inseam: 76-82 cm
Size
L
Height
176-188 cm
Inseam: 81-87 cm
Size
XL
Height
186-198 cm
Inseam: 86-93 cm
Size
26" Wheel
Height
157-179 cm
Inseam: 73-85 cm
Size
27.5" Wheel
Height
171-190 cm
Inseam: 79-90 cm
Size
XS
Height
150-160 cm
Inseam: 67-72 cm
Size
XXL
Height
193-204 cm
Inseam: 91-98 cm
FAQ
Short answers for choosing a size before purchase.
Should I size up or down on a mountain bike?
Size down for maneuverability and size up for stability, but only after standover and reach both work.
Is MTB size based on height or inseam?
Height sets the first range. Inseam confirms standover, and reach determines how stretched the cockpit feels.