48v 1000w electric bike conversion kit three years warranty e-bike conversion kit 82% efficiency 40 ... km/h speed 16-28inch. hot! CE, 2013 NEW, three year warrany 1000watts electric bike conversion kit, e-bike conversion ... , 12G spokes, double-wall alloy rim) Wheel size: 16"20"24"26"28" and 700C for choosing. 2. A 48v ... 16" 18" package size: 55cm x 50cm x 21cm 20" 24" package size: 55cm x 55 cm x 22cm 26 ...