Bicycle Tube 12.1/2 x 2.1/4 B/V 45/90

High-performance replacement tube engineered for reliable puncture resistance and durability. This 12.5 x 2.25 size fits a wide range of smaller wheel diameters, making it ideal for kids' bikes, BMX, and compact folding models. The butyl valve construction, with 45/90-degree angle options, ensures secure seating and compatibility with most rim types. Built to BiCycle Lab standards for consistent performance and longevity on every ride.