Heavy Duty 20x3.0 Bike Inner Tubes with Schrader Valve - Thicker Butyl Rubber About this item Thicker Butyl Rubber: BlueStars inner tube features a sidewall thickness of 1.05mm, thicker than the standard 0.75~0.98mm, offering superior puncture resistance and better air retention. The thick butyl rubber also absorbs shocks, reducing the impact of bumps and uneven terrain, providing a more comfortable ride. Puncture-Resistant Design: The tubes are engineered with reinforced rubber to withstand punctures from sharp objects, offering better protection against flats. Ideal for urban and off-road riding, the puncture-resistant feature ensures a smoother, more reliable ride. Compatible with 20x3.0 Tires: Specifically designed to fit 20-inch tires with a 3.0-inch width, BlueStars Schrader Valve Inner Tube is ideal for mountain bikes, gravel bikes, city bikes, and electric bikes, providing a seamless fit and reliable functionality for a smooth, uninterrupted ride. Standard Schrader Valve for Easy Inflation: Features a reliable Schrader valve, making it compatible with most standard bike pumps and providing an easy inflation process. The valve is designed for secure attachment and consistent air pressure. Enhanced Air Retention for Longer Rides: Built to retain air for extended periods, reducing the frequency of necessary inflation and maintaining optimal tire pressure, ensuring better performance, control, and comfort throughout your ride. 100% LIFETIME PROTECTION: Enjoy reliable performance with our lifetime protection, ensuring that your product will always be covered for any defects or issues that may arise.