theebikemotor 3000W Hub Motor Electric Bike Conversion Kit + LCD+ Disc Brake Rear Wheel The kit includes the motorised wheel, motor controller, brake lever, throttle, LCD or 3.2" TFT display(it comes with LCD display if you don't choose TFT Display for the style option), Disc Brake & single speed gear if you don't choose the 6 or 7 speed Gear Top speed: 72-80km/h(50mile/h) goes with 26inch wheel; Big torque, 155N./M, good ability to climb the hills; 24 MOZ Tube controller (24MOZ tubes in it). The width of the 21" Motorcycle rim is 42mm. Fits 2.75 width Tire. 4.0 Fat rim width: 80mm LCD display shows battery power level, time, speed, mileage, gear. Disc Brake: For front wheel 160mmDia. plate; For rear wheel 140mmDia. plate. Extend life time for the brake, much sturdier than V-brakes