BriefThe Electric Bicycle KIT is also named Electric Bike KIT and Motor KIT. The Motor is a geared, brushless hub motor with DISC brake compatible and up to 7-speed freewheel. The internally geared drive system means the Motor gets more torque in a smaller, lighter package than other hub motors. Motor Spec.:ModelM12180M12060Rated Power(W)250-800250-1000 Rated Voltage(V)24/36/4824/36/48Speed Range(rpm)160-520160-520Efficiency(%)>80>80Noise(dB)<65<65Weight(kg)44Gear Ratio5:15:1UsageFront Hub motor for electric bicycle,golf cart,ATV etc.RearHub motor for electric bicycle,golf cart,ATV etc. Features (1). High efficiency (2).Super starting performance and excellent climbing ability. (3). DISC brake compatible and up to 7-speed freewheel (4). geared drive system means more torque in a smaller, lighter package (5). Clutch ensures effortless riding experience (6). Long life, Free maintenance The performance curve of this product: (If you download this picture, it will be clear.) The performance data of this product: (If you download this picture, it will be clear.) MAC offers the best price-to-performance valuable products in the market.If you have any problem, please feel free to contact us.Thanks !