Product Description: 20"x1.75-2.125: For 20x1.75/1.95/2.10/2.125 bike tubes 2 pack. Ideal for city riding, daily commuting, and summer use where stability, comfort, and durability are important. Superior Material : Made from premium butyl rubber with a low heat build-up and high stretch formula, this 20x1.75 to 2.125 bike tube helps resist heat accumulation and aging and provides stable performance during hot summer rides and long-distance use. Secure & Leak Resistant: Equipped with a durable 35mm Schrader valve for easy inflation and a secure fit. Designed to maintain strong air retention and reduce the risk of air leakage during daily riding. Easy Installation: Includes 2 bike inner tubes and 2 tire levers for quick and convenient installation. Flexible structure and smooth surface make 20in bicycle tube replacement easier for both beginners and experienced riders.