Duro Bicycle Tube 27.5/650b x 1.95/2.125 50/57-584 A/V 48MM

High-performance bicycle tube engineered for 27.5" (650b) wheels with a 1.95–2.125" tyre width range. Features a durable 50/57-584 ETRTO spec and a Schrader valve (A/V). It has a 48mm stem for reliable air retention on trail, XC, and all-mountain rides.

Duro tubes are built to withstand puncture stress and maintain consistent pressure through demanding terrain. The 48mm valve fits standard rim depths without bottoming out. It ensures easy inflation and a secure fit on most wheel builds.

Ideal for mountain bikers who want dependable, budget-conscious replacement or spare tubes without compromising performance. Stock one for your spare kit.