1 electric bicycle conversion kits 2 with CE approval, 3 motor: 180-250W high speed 4 Controller: 36V/48V Electric bicycle conversion kits 1. Charger: 36V/48V2. Wheel size: 20 ... cables,switch bar,battery steel case,controller,charger etc7. Motor: 180W,250W,350W,500W,800W,1500W,2000W,etc we can supply electric bicycle conversion kits