TopSpeed: 22-25 mph (35-40 kph) based on 28 inch wheel
BatteryLife: Over 800 Charges
ChargeTime: 5 Hours
This type of sensor is based on measurement of chain tension, with designated mounting angle, being compatible with standard bicycle chain ring/crank arm. It has dual torque sensing with 24 pulses of signal per cycle.
1.Bafang G020 36V350W Rear screw freewheel motor with 20/24/26/27.5/28 inch rim