Tyre 10 x 2.125 Tire 10" + Tube for Smart 2-wheel Electric Scooter 10 Inch Unicycle Easy to install, take off old one, bolt on tire and inner tube, good to go Inner Tube Material : Isobutylene Isoprene Rubber which is better in air tightness, elastic damping and aging resistance than natural rubber. Inflatable inner tube with TR87 bent valve stem and 2 caps Package includes: 1 x tire + 1 x Inner Tube Fits Most Scooters & Bikes - Our bike tires and inner tubes are compatible with most electric self balance scooters, kids mini bike, strollers, and tricycles with 10x1.75"-10x2.125" and 10.5x2.25" tires and 6" rims. Please notice the valve size with your origion one. Enjoy Safer Rides For Longer - This premium heavy duty 10 x 2.125 bike tire tube wheel stands well against wear and tear and is designed with an expertly engineered tread pattern for increased grip on slippery terrain. No Blowouts & Damage - The 10x2.125 scooter tires have an upgraded nylon cord fabric and bead chaffers for enhanced strength against folding and impact. This reduces the chances of tire bulging and blowouts. Better Air Retention - The butyl rubber inner tube for bikes has a copper valve with a thick valve seat. It's 30% thicker and 480% more elastic to retain air and reduce the need for inflations. Your Satisfaction Is Our Priority - Includes 1 inner tube and tire with dust cap. Every purchase is backed by 6 months replacement or refund with hassle-free returns and lifetime customer service.