The CST Schrader Valve Tube 29 x 1.9-2.5" 48mm is CST's most popular tube, designed for optimal performance and durability. With a higher concentration of butyl, this tube offers increased flexibility, ensuring a smooth ride on various terrains. It fits tires ranging from 1.9" to 2.5" in width and features a 48mm Schrader valve for convenient inflation. The robust .97mm wall thickness provides added reliability, making it an excellent choice for cyclists seeking quality and performance.