The Schwalbe Tube No.20 Extra Light fits 28" (or 27" –630) tires with a width of 18-25 mm and is used on racing bikes, lightweight cross and trekking bikes, etc. The Extra-Light provides you with the usual quality and reliability of the standard tube while reducing weight. Due to their excellent manufacturing, Schwalbe tubes have proven themselves on the market for years. They are uniform in wall thickness and round in operation. Their precise forming makes them durable at the seam. A comparison test revealed that the Schwalbe tube maintains air pressure significantly longer than other tubes (the others lost almost twice as much air pressure as the Schwalbe tube within 30 days). A possible reason for this could be a lower butyl content in the other tubes. The special quality of Schwalbe tubes comes from the uniqueness of their rubber compound. To ensure this high quality, each individual Schwalbe tube is inflated and tested for at least 24 hours before leaving the factory. Features: - Extra Light – significantly lighter with the same durability (65g) - Butyl rubber ensures double the air retention - 24-hour test for each tube - High elasticity allows coverage of many tire sizes per tube - Recycling process achieves very good energy balance Suitable for the following tire sizes: - 18-622 | 28 x 0.75 | 700 x 18C - 18-622 | 28 x 3/4 | 700 x 18C - 19-622 | 700 x 19C - 19-622 | 700 x 19 - 20-622 | 28 x 0.75 | 700 x 20C - 20-622 | 28 x 3/4 | 700 x 20C - 22-622 | 28 x 0.90 | 700 x 22C - 22-622 | 28 x 7/8 | 700 x 22C - 22-622 | 700 x 22 - 23-622 | 28 x 0.90 | 700 x 23C - 23-622 | 28 x 7/8 | 700 x 23C - 24-622 | 700 x 24C - 24-622 | 700 x 24 - 25-622 | 28 x 1 1/16 - 25-622 | 28 x 1.00 | 700 x 25C - 22-630 | 27 x 7/8 - 25-630 | 27 x 1.00 Valves: - AV = Auto, Schrader - DV = Dunlop, Blitz, German Valve - SV = Sclaverand, Presta, French Valve (40, 50, 60 or 80 mm for different rim heights) Contents: - 1 x Schwalbe Tube No.20 Extra Light including valve