Features： 1、ANTI EXPLOSION: The wheel as a whole is strong and explosion proof, and does not need to be inflated by the user, so it is easy to use and replace. 2、ALLOY STEEL WHEEL HUB: The wheels are made of alloy steel hubs, rust proof and durable, with strong load bearing capacity. 3、PU WHEEL: The tires are made of PU, which has good anti slip and wear resistant characteristics and long service life. 4、FINE WORKMANSHIP: The tires adopt professional design and precise manufacturing process, the texture is anti slip and wear resistant, suitable for various road surfaces and stable performance. 5、MAIN APPLICATION: The tires are suitable for electric wheelchairs, carts, etc. and are very much used as replacement tires. Specification： Item Type: Electric Wheelchair Wheel Material: PU, alloy steel Wheel Outer Diameter: Approx. 320mm / 12.6in Wheel Thickness: Approx. 54mm / 2.13in Center Hole Diameter: Approx. 17mm / 0.67in Center Column OD: Approx. 34mm / 1.34in Center Hole Slot Width: Approx. 6mm / 0.24in Package List： 1 x Electric Wheelchair Wheel