SCHWALBE SV20 Extra Long and Light Inner Tube

A bicycle tube is predominantly made of Butyl rubber. Butyl is a very elastic and airtight synthetic rubber. But as with the tire, other fillers are necessary to make up the rubber compound. The quality of a tube can vary significantly depending on the rubber compound. For instance Schwalbe tubes have extremely high air retention and elasticity.
This high elasticity allows a wide range of different tire sizes to be covered. Besides the quality of the ingredients, the purity of the rubber compound is decisive for the quality of the tube. Before extrusion, the basic material is forced through a total of seven filters under enormous pressure. All tubes are inserted and inflated into a mold for the vulcanization process. Only this ensures an even wall thickness and high air retention.
Valve type: 80mm Presta Valve
Size: 28"
Tire: 18/25-622/630
Model number: SCH 10426383 / SV20
700X18-25C