27.5 x 3.00 650B SCHWALBE AV21F Inner Tube 40mm Schrader / Car / Auto Valve

27.5" (650B) Tyres. Before extrusion, the basic material is forced through a total of seven filters under enormous pressure. All tubes are inserted and inflated into a mould for the vulcanization process, only this ensures an even wall thickness and high air retention.

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