Made from the highest quality ingredients, the purity of the rubber compound in Schwalbe tubes is decisive for the quality of the tube. Before extrusion, the basic material is forced through a total of seven filters under enormous pressure. It is then inserted and inflated into a mold for the vulcanization process. Only this ensures an even wall thickness and high air retention.
All Schwalbe tubes are inflated and stored for 24 hours to test for air retention. Afterwards, every tube is carefully checked individually by visual inspection. The valve is nickel-plated and threaded, and the valve core is replaceable.
## PLEASE NOTE THESE ARE 507 INNER TUBES ##