THE DIRT BIKE TOOLBOX

Dirt bike calculators

Compare trail and track gearing without losing sight of the trade-offs.

Calculate dirt-bike overall gearing from primary, transmission and sprocket reductions. Compare theoretical speed at your entered engine RPM.

Compare rear-sprocket options for a dirt bike and quantify the trade-off between gearing reduction and theoretical road speed at a fixed RPM.

Build a complete understanding of your setup.