Full Speed:48V 500W about 40-50km/h, (different wheel size, road&weather condition and rider's weight will have different speed) 2. Hub Motor: Brushless Non-gear Hub Motor 3. Rim: Double-wall Aluminium Alloy Rim 4. Wheel Bottom bracket: Rear 135mm-142mm or Front 100mm 5.Torque:30-40NM for 500W 6. RPM:470 for 48V 500W. 1 Front or Rear Motor wheel(20/24/26/27.5/28/29inch 700C). 1 pair Power cut-off Brake lever. 1 7 speed Thread freewheel. Your satisfaction is our top priority and we are confident that you will be pleased with our services.