Suitable dimensions40-584 27.5 x 1.5047-584 27.5 x 1.7550-584 27.5 x 2.0054-584 27.5 x 2.1057-584 27.5 x 2.2560-584 27.5 x 2.3562-584 27.5 x 2.40airtightness; Schwalbe tubes retain air pressure considerably longer; The quality and the material purity of the rubber mixture directly effects the quality of the tube; Each schwalbe tube is individually inflated and inserted into a mold;
This ensures the even wall thickness and excellent air retention; reliability; Consistent quality control brings with it the security of use: each tube is inflated at the factory and stored under pressure for 24 hours in order to test the air retention; Group tube system;
The high elasticity and quality material used in our tubes allows a great many tire sizes to be covered; For example tube no; 17 fits section widths from 28 mm up to 47 mm; Only an extremely high-quality and reliable tube is up to this requirement;
very good the only tube marked very good" by the swiss consumer magazine 'kassensturz'; 29.05; 2012; 12 tubes in the test;
Test winner: schwalbe sv13 retains pressure longer In comparative tests against other tubes including named brands, own-label brands and no name products; The result was clear; Over a period of 30 days the other tubes lost nearly twice as much pressure than schwalbe tubes; Possible reasons: less butyl content, or lower quality of butyl;
Schwalbe is uncompromising in its standards; despite ever increasing world market prices of butyl; All tubes were tested on the same rim with the same tire; Tire size 28 x 1.75 47-622;
Start pressure 5 bar; Loss after 30 days.
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