Vredestein inner tube MTB 47/62-559/584 26x1.75-27.5x2.40 car/schrader valve 40mm. The main component of Vredestein inner tubes is butyl, a synthetic rubber with very low gas permeability. This ensures the inner tube maintains the desired pressure for longer. Vredestein inner tubes are high-quality inner tubes produced according to the Unitube system, which means they are suitable for multiple tire sizes.