The CST 20 x 3.50/4.50 AV bike tube is a high-quality and durable inner tube designed for wider bicycle tires. Equipped with a robust AV (Schrader) valve, it ensures secure inflation, strong resistance against punctures and long-lasting reliability.
Ideal for fat bikes, city bikes, cargo bikes, e-bikes and all bicycles using 20-inch wide tires, this tube offers excellent elasticity and air retention, providing smooth and safe riding performance.