(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.Packing List 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 17+-1A Controller 1 Controller Bag 1 pair Power cut-off Brake lever 1 set Twist Throttle with LED Display 1 8 Magnet Pedal Assistant Sensor. Your satisfaction is our top priority and we are confident that you will be pleased with our services. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Electric Bicycle Components". The seller is "lightinbike18" and is located in this country: CN. This item can be shipped worldwide.