bicycle electric motor kit for front wheel, 250W, 350W and 500W in 24V and 36V. WITHOUT BATTERY. Parts List:1) The ... 180~250w ,350W.450W.500W.1000WCertification CEWheel Size 20" 24" 26" 28"Max Speed 32km/h bicycle electric motor kit for front wheel, 250W, 350W, 500W ...