Speed Configurator

Work out the theoretical top speed of a setup before you build it. Pick a car to pre-fill the stock gearing rlaarlo publishes, then tweak everything.

CarMotor KVrpm per volt, e.g. 2050

Battery voltagechips fill nominal 3.7 V/cell — a full charge is 4.2 V/cell

Pinion teethSpur teeth

Diff / final drive ratiointernal gear reduction, e.g. 3.0Wheel diameter (mm)measure across the tyre — rlaarlo doesn't publish this

Theoretical top speed

Fill in every field to see the number.