【Wide Compatibility】Fits most pocket bikes gas scooters electric scooters mini bikes mobility scooters with 12-inch to 12.5-inch tires that are between 1.75 to 2.25 inches wide. 【Replacement Inner Tubes】Compatible with Bella Betty Bistro Blossom Chrissy Daisy Hannah Montana Kiki Sweet Pea Vapor scooters and Currie Schwinn GT IZIP eZip X-Treme MX125 Dirt Rocket scooters and more. 【Heavy Duty Inner Tubes】This 12 1/2 x 2 1/4 inner tube is made of thickened butyl rubber material, which has good air tightness, is not easy to explode and has a longer service life. 【Shock Absorption】Thick butyl rubber that can also absorb shock will prevent you from feeling bumps and give you a more comfortable riding experience under different road conditions. 【Bent Valve Stem】With TR87 bent valve stem, it is more convenient to inflate the inner tube. The thickened valve seat is sturdy and durable, has good sealing performance and is not easy to leak. RUTU 12 1/2 x 2 1/4 inner tube is made of thickened butyl rubber material, which has good air tightness, is not easy to explode and has a longer service life. Fits most pocket bikes gas scooters electric scooters mini bikes mobility scooters with 12-inch to 12.5-inch tires that are between 1.75 to 2.25 inches wide.