Schwalbe AV19 29er Tube The Schwalbe AV19 Tube is made for riders who are sick of using cheap and nasty tubes that just seem to puncutre a little more easily than what they should. These are also a great upgrade from the stock tubes that come on new bikes, which are usually low-rent items to keep the costs down. Like all Schwalbe tubes, you will notice the huge range of tyre sizes that they will fit, which is due to their high quality - no other brand's tubes can withstand such a broad range of tyre widths.
"A Tube is not just a Tube" 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. Elasticity 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 tube’s quality. Only an extremely high-quality and reliable tube is up to to this requirement.
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