Engyi powerful DGW25E motor is strong enough to ride on rough mountain trail, which offers stable, smooth and continuous power to support 60NM max torque. Main parameter of DGW25E-Rear Drive Motor-MTB specification parameter Driving position Rear Wheel size 20in-28in Spoke 36holes 12G Rated power 500W (750W customized) Rated voltage 36V~48V Max.torque 60N.m Efficiency 80 Cable side Left Number of magnet 16 Reduction gear ratio 1:5 Installation dimension 175mm(Cassette&Screw)190mm(Cassette&Screw) Inside speed sensor 1~6 Hall sensor With/Without Free wheel Cassette 9-10s/Screw 6-7s Brake Disc-brake/ V-brake Classification of waterproof IPX5 Weight 4.6Kg As a hub motor supplier, we provide hub motor 500w, 500 watt rear hub motor, 500 watt hub motor, shengyi electric bike motor, etc. For more, contact us.