Premium quality - Made of premium butyl rubber, extremely tear-resistant, scratch-resistant and durable, it is equipped with a high-quality valve that preserves more pressure. Stable performance - Upgraded version thicker rubber tires have good flexibility and buffer capacity, with the ability to resist pressure changes, the valves are well made and can retain more pressure. Excellent performance - Compared with other rubber tires, it has good cushioning effect, non-slip, with double thickness design ensuring flexibility. Easy installation - The replacement inner tire is extremely practical and simple to install.Please check the position of the valve and make sure you install it in the correct direction. Before installation, check whether the inner tubes are completely sealed by putting them in the 'water. If there are bubbles, they are already damaged. Easy installation Step 1 Manual assembly. We recommend softening the tire. Step 2 Insert one side into the wheel slot, then step on the tire with one foot. Step 3 Mounting the tire requires tools. If you have no experience, please contact a repair master. Product specifications: Material: Butyl rubber Approximate dimensions: Diameter exterior: 10" Net weight (approximately): 120 g Color: black