· SIZE: 32mm Schrader (Regular valve).Fits all 24"x1.75/2.125 bike tire tubes· Installation Precautions: Please check the side of your tire for the tire size your bike uses· MORE DURABLE: The bike tube is made from premium butyl rubber. It features better sealing performance, ozone resistant, anti-aging, shock absorption and electrical insulation merits· Easy To Install: Installation is quick and easy. Please follow inflation guide when airing a tire from a complete flat. Hassle free to replace your old tire tubes within minutes which is time saving and efficient· Safe Bike Tires: The butyl rubber tire tube replacement absorbs shocks on bump road for a comfort and safe ride. It is heat resistant and stands wear and tear for daily use