Features1Wheel Hub: Using aluminum alloy material precise casting, strong bearing capacity, not easy to deform, and good heat dissipation. Suitable for matching disc brake discs with hole pitch of 4cm/1.6in and 5 holes and diameter of 120mm/4.7in. Wheel hub plays the role of tire support and load bearing. 2Inflatable Inner Tube: Stable internal structure, strong flexibility, can fully meet the international standard air pressure, so as to better protect the user's safety and riding comfort. 3Durable Material: Outer tire and inner tube are made of rubber, which has good wear resistance, long service life, soft material and stable production structure, and has good structural strength. 4Pneumatic Tires: Compared with solid tires, pneumatic tires have good damping properties, allowing you to drive on most roads and give you a comfortable driving experience. But it should be noted that any tire may be punctured by acuminate objects, pay attention to protection. 5Applicable Model: Rear wheel assembly is suitable for Xiaomi M365 PRO PRO2 8.5 inch two wheeled electric scooter, used for repair and replacement of the rear wheel of the electric scooter.SpecificationItem Type: Rear Wheel AssemblyColor: As Pictures ShownTire Size: 8 1/2 X 2Tire Valve: Straight ValveMaximum Load: 75kg/165.3lbWeight: Approx.1347g/47.5ozMaterial: Aluminum Alloy + Rubber + Stainless SteelSize: Outer Diameter: Approx. 22cm/8.7in, the Total Length of the Hub Center Shaft: Approx. 9.8cm/3.9in (Middle: Approx. 7.8cm/3.1in, Both Sides: Approx. 1cm/0.4in)Package List1 x Rear Wheel Assembly (Inner and Outer Tire + Wheel Hub + Brake Disc)