... motor,high powerfull 2.high efficiency, low nosie electric bicycle brushless dc motor,electric bike hub motor,e-bike motorBrushless Hub Motor ... 500W for Rear Wheel: Voltage: 48V Power: 500W Motor Type: Brushless Gearless Hub Motor Motor Net Weight: 6kgs Motor Diameter: 240mm ... , 6-Speed Available Wheel Size: 16", 18", 20" electric bicycle brushless dc motor,electric bike hub motor,e-bike motor