The new brushless HLD22 motor is a new high power and sportive model and is compatible with disc or v-brakes. Having undergone an internal redesign including the application of new firmware, noise and vibration levels have been further reduced to 60dB- increasing output from 36V/250W to36V400W or 48V/500W to address special geographical needs. Meeting the demands for more power, the HLD22 offers broader vehicle "reach" for longer urban and suburban distances on all terrains. More modern and elegant in design, this motor has an integrated controller and IPX4 industrial waterproof bearings. Besides this motor can be easily incorporated into the 26" and 28" wheeled bikes and used with standard 135mm hubs.自己可以改