Schwalbe Tube SV4. 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.

16x1-3/8 (37-340)

16x1-1/8 (28-349)

16x1-3/8 (37-349)

18x1-1/8 (28-355)

18x1.35 (35-355)

Weight: 85g, Stem length: 40mm