Scooter Conversion Set Aluminum Alloy Wheel Wear-resistant Electric Scooter Hub Motor for Electric Bicycles for 8in Electric Specification: Item Type: Electric Scooter Conversion Set Material: Rubber + Aluminum Alloy Color: As Pictures Shown Weight: Approx. 4580g/161.6ozRated Power 350W Mounting Type: Brushless and Toothless Applicable Model: Suitable for 8in Scooter 200x50 Tires and Other Modifications Axle Open File: 107mm/4.2in Axle Length: 159mm/6.3in Motor Diameter(included tire): 20cm/7.9in The Top Speed is 20-28 Kilometers Per Hour Package List: 1 x Motor 1 x Controller 1 Pair x Throttle grip 2 x Key