... 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 ... (optional) Lead-acid battery: 36V/12Ah, 36V/14Ah, 48V/12Ah, 48V/14Ah (optional) Max Speed: 25km/h(EU standard) or ...