Schwalbe SV 40mm Tube 6 (20") 20 × 1.1–1.6

Schwalbe standard bicycle inner tube no. 6. For bicylce tires in 20" inch (ETRTO 28→40-406). 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.