Schwalbe AV Tube 4 (16"/18") 16-18x1.1-1.45

Schwalbe standard bicycle inner tube no. 4. For bicylce tires in 16"/18" inch (ETRTO 37-340, 28→37-349, 28→35-355). 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.