RC Gear & Speed Calculator

Calculate your Final Drive Ratio (FDR) and theoretical top speed with precision. Optimize your setup for the track.

Drivetrain Configuration

Pinion Teeth

Spur Teeth

Internal Ratio

Motor KV

Voltage (Volts)

Tire Diameter

Units

Gear Ratio

0.00

Final Drive Ratio (FDR)

0.00

Est. Top Speed

0.0

km/h

* Theoretical speed. Real-world results will vary due to drag, tire expansion, and drivetrain efficiency.