Please check the sidewall of the tire to determine the tire size used on your bike. * High-quality - Bike inner tubes are made of premium butyl rubber, featuring good sealing performance, ozone resistance, aging resistance, shock absorption, electrical insulation, and other advantages. * Easy installation - Quick and simple to install. Follow the inflation guide when the tire is completely deflated. It's a time-saving and effortless process, allowing you to replace the old tube in just a few minutes.