1、Aluminum Alloy Hub: The wheel hub is made of aluminum alloy, which is light in weight, strong in bearing capacity, not easy to deform, and good in heat dissipation. 2、Wheel Hub Function: The wheel hub is matched with the disc brake with 5 holes, 4cm hole spacing, and 110/120mm diameter, which plays the role of tire support and load bearing. 3、Main Features: The pneumatic inner and outer tires are made of high quality rubber material, which has good friction resistance and service life, soft texture and stable production structure. The inner structure of the inflatable inner tube is stable, with strong flexibility, it can fully meet the international standard air pressure. 4、Pneumatic 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. 5、Applicable Models: The rear wheel assembly with inner tube and hub is suitable for Xiaomi M365 PRO, PRO 2 electric scooters, used for repair and replacement of the rear wheel of the electric scooter. Item Type:8.5 Inch Rear Tire with Inner Tube and Hub Material: Aluminum Alloy + Rubber Product Color: As Pictures Shown Tire Specification: 8 1/2 x 2 Tire Outer Diameter: Approx. 22cm / 8.7in Total Length of the Central Axis of the Hub: Approx. 9.8cm / 3.9in (7.8cm / 3.1in in the middle, 1cm / 0.4in on both sides) Wheel Hub Outer Diameter: Approx. 17cm / 6.7in Wheel Hub Width: Approx. 4.5cm / 1.8in Product Weight: Approx. 1220g / 43.0oz Tire Valve: Straight Valve Maximum Load: 75kg / 165lbs Applicable Models: Suitable for Xiaomi M365 PRO, PRO 2 Electric Scooters 1 x Rear Wheel Assembly (Inner and Outer Tire + Wheel Hub)