... bike conversion kit 200W, 250W, 350W,500W brushless motor 20", 26", 28" wheel 36V/12Ah, 36V/14Ah, 48V/12Ah, 48V/14Ah Electric Bike Conversion ... KitKit for converting normal bicycle into electric bicycle, easily assembledFront Hub Brushless Motors available: 200W, 250W, 350W, 500W ...