Schwalbe Tube SV21A. Extra Light. 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. 27.5 x 1.50 27.5 x 1.75 27.5 x 2.00 27.5 x 2.10 27.5 x 2.25 27.5 x 2.35 27.5 x 2.40
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