This rear-drive motor has a rated power of 350 or 500W and a maximum torque of 60N.m ideal for sportive eMTBs, touring and commuter eBikes. Compatible with disc brakes and with In Tube, a geared hub motor has gearing inside it to reduce the high speed of a fast and efficient motor to the low speed of the wheel. Aikema is dedicated to providing the very best quality motors and service.We strive to be the best in the industry and innovate our products. 100SX 100 R250 BBC A3 High Efficiency, High Torque Rear Wheel Hub Motor Rated Power (W) : 250 Rated Voltage (DCV) :24,36,48 Wheel Size(Inch) :20"-28" Max Torque(N.m) :50 N.m Efficiency (%) : 80 Weight (kg) : 2.1 Speed(km): 25km/h Noise Grade (dB) :