Passion eBike 48v 1000W watt hub motor conversion kit for 26" Rear Wheel with MTX39 Rim Rear motor with 7 speeds Full Speed: about 55-65km/hour SUN Ringle MTX39 Double-wall Aluminium Alloy Rim High Quality 18 MOSFET 45A 1 Controller Recommended battery: 48V 18AH the above