Crank Arm Leverage & Torque Calculator

Calculate mechanical advantage and required bike fit adjustments.

Input Parameters

Units

Calculation Results

Leverage Change

+1.47%

Saddle Adjustment

-2.5mm

Current Diff: 2.5mm

Important Fit Note

Changing crank length affects your pedal-to-saddle distance. If you increase crank length, you decrease the distance at the bottom of the stroke. Lower your saddle by the difference in length to maintain the same knee extension.