This app is designed by R/C car fans ! it can easy to calculation .....
- Motor rotates once moving how many distance(Rollout)
- Finial gear ratio
- Internal gear ratio
- Dynamic gear ratio chart
- Easy screen capture for share gear ratio chart
- Car gear ratio data base


Calculation moving distance you can accurately set the gear ratio for different types vehicle(eg...Touring, M-Chassis, F-1, 1:12)