Motor: RV-120-Pro, 64Kv (6kW continuous, 15 kW burst)
Controller: Kelly KLS7230S  - 120amp continuous, 300amp burst.
Current limited to 100amps (4.5kW = 6HP)
Gear: 12 tooth to 30 tooth chain reduction to live axle.
Wheels: 11inch (280mm)
Max speed with 48V battery is about 38 MPH (60km/h)
Regenerative braking

YouTube link: https://www.youtube.com/watch?v=7XJTyHLPJzo