Full Speed:about 20-35km/hour, (different wheel size, road&weather condition and rider's weight will have different speed) 2. Hub Motor: Brushless gear Hub Motor 3. Rim: Double-wall Aluminium Alloy Rim 4.Wheel Bottom bracket: Rear 135mm-142mm or Front 100mm 5. Noted:Battery, inner and outer tires, thread freewheel, disc. 1 Front or rear Motor wheel(20/24/26/27.5/28/29inch 700C). 1 DC Controller 1 Controller Bag 1 SW900 Display 1 pair Power cut-off Brake lever 1 set Twist Throttle 1 8 Magnet Pedal Assistant Sensor. Your satisfaction is our top priority and we are confident that you will be pleased with our services.