Schwalbe SV6

"The Schwalbe standard bicycle inner tube Nr. 6 is the ideal choice for bicycle tires in the size of 20 inches (ETRTO 28/40-406). This inner tube is characterized by its exceptional airtightness, which means that it retains air for an above-average length of time. This is achieved by the excellent material quality and the uniform wall thickness, which ensure constant performance. The proven reliability of this tube has already been confirmed millions of times and offers you the safety you need on your bike tours. Whether for the daily commute to work or for long bike rides, the Schwalbe SV6 inner tube is the perfect addition to your 20inch tires and ensures a smooth ride."