RC Crawler Overdrive Calculator

Start with a stock vehicle or build the drivetrain one component at a time.

Choose a brand first, then a model. The stock preset fills every field below. Manual changes keep the selected base truck, and Reset to Stock restores its factory configuration.

Front Axle

Axle reduction: —

Rear Axle

Axle reduction: —

Transmission / Transfer Case

TOTAL OVERDRIVE 0.00% Front and rear wheel speed are equal.
Transmission Contribution—
Axle Contribution—

Overdrive uses percent difference between front and rear wheel speed. Axle and transmission effects are compounded, not added.