MashON useful tools
Estimate bicycle saddle height from barefoot height or cycling inseam, in centimeters or inches. Compare LeMond and Hamley starting points.
Switching units converts your entered values. All results use the same formulas as MashON for iPhone.
Your inputs stay on this device. This tool does not upload or save them.
Measure saddle height along the seat tube from the bottom-bracket center to the saddle top at your normal sitting point. Measure cycling inseam barefoot with a level book held firmly between your legs; measure floor to the top edge. Read crank length from the crank arm.
The height estimate assumes an inseam of 45–49% of body height, then multiplies by 0.883. This broad illustrative range is not a validated fit interval. Measuring inseam is more useful.
LeMond = inseam × 0.883. Hamley = inseam × 1.09 − crank length (in centimeters). For an 82 cm inseam and 172.5 mm crank, these give 72.4 cm and 72.1 cm, with a midpoint of 72.3 cm.
These estimates do not account for flexibility, shoes, pedals, saddle shape, or riding position. Make small adjustments and check your comfort and pedaling. If discomfort persists, consult a qualified bike fitter.
MashON is available for iPhone and Apple Watch.
Download on the App Store
