Schwalbe Bicycle Tube - 40mm Schraeder Auto 20 x 1.5 20 x 2.5 - 40mm Schraeder Valve - AV7

All you need to know about Schwalbe tubes is in this Schwalbe Tubes Guide. Schwalbe tubes are known to be some of the most reliable tubes on the market. German made, all tubes are tested twice, including a 24-hour inflation to ensure optimum air retention. Airtightness. Apart from the quality of the ingredients, the purity of the rubber mixture is crucial to the quality of the tube. The base material is therefore sieved at enormous pressure through seven filters before being extruded. All tubes are inserted into a mould and inflated for vulcanization to ensure constant wall thickness and high air pressure retention. Reliability. All tubes are inflated and stored for 24 hours in order to test for air pressure retention. Afterwards each, individual tube undergoes a careful visual inspection. This special quality control helps prevent unpleasant surprises and is why, over many years, Schwalbe tubes have become highly respected for outstanding reliability by bicycle dealers. Group tube system. Only high elasticity and good quality allows a tube to cover very many tire sizes. Tube No. 17 can fit tire widths between 28 mm and 47 mm and that is a big advantage to the trade and simultaneously it vouches for the tubes quality. Only an extremely high-quality and reliable tube is up to to this requirement. Valve. All valves are nickel plated and threaded and valve inserts are replaceable. Also Schwalbe tubes with the classic bicycle valve are capable of pressure testing thanks to a high pressure valve seal. And it is plain to see as each tube is crowned with a transparent polycarbonatedust cap. Sizes Tube Fits ETRTO sizes Fits tire sizes Size French Weight Valve Type Art.No. AV 1 47-203 12 1/2 x 1.75 80 g Schraeder Valve 10405310 50-203 12 x 2.00 54-203 12 x 2.10 62-203 12 1/2 x 2 1/4 AV 2 37-288 14 x 1 3/8 350 x 35A 85 g Schraeder 10407310 44-288 14 x 1 5/8 350 x 42A 32