Features of Aibiku 8.5-Inch Thickened Inner Tubes, Inflatable Tires For Xiaomi M365, Gotrax Gxl V2 Scooter Inflated Spare Tire - With Valve Extension And Metal Valve Caps, 8 1/2 X 2 (Pair) Thickened & Durable ade of high-quality butyl thickened rubber, 18mm thick, which is twice the thickness of the..