Schwalbe SV 40mm Tube 7S (20") 20 × 1.10–1.45

Schwalbe standard bicycle inner tube no. 7S. For bicylce tires in 20" inch (ETRTO 37-438, 28→37-440, 28→37-451). Retains air for an above-average length of time. Thanks to the best material quality and uniform wall thickness. Maximum reliability that has proven itself millions of times over.