Schwalbe Tube SV7A. Reliable, high quality and very air tight inner tubes from Germany's number one manufacturer. All valves are nickel plated and valve inserts are replaceable.

20x1-3/8 (37-438)

500x28A (28-440)

500x28A (37-440)

20x1-1/8 (28-451)

20x1-3/8 (37-451)

Weight: 105g, Stem length: 40mm