SCHWALBE Tube AV17 700x28/45C AV 40mm (28/47-622) 150g

Inner tube 700x28/45C AV 40mm (28/47-622) 150g

A bicycle inner tube is made mainly of butyl rubber. Butyl is a very elastic and airtight type of synthetic rubber. As with tires, additional additives are needed to create the rubber compound. The quality of the inner tube can vary significantly depending on the composition of the rubber. For example, Schwalbe inner tubes have extremely high air stability and elasticity. This high elasticity allows them to cover a wide range of different tire sizes.

There is a difference between hot-formed inner tubes and autoclave inner tubes. Vulcanization in the mold improves the uniformity of the wall thickness, thereby reducing weight and improving air stability. For this reason, autoclave inner tubes, which are easier to manufacture, have become less common in recent years. Schwalbe inner tubes have always been manufactured using a thermoforming process.

Every inner tube also needs a valve, which is connected to the inner tube during the vulcanization process.

In addition to the quality of the additives, the purity of the rubber compound is crucial for the quality of the inner tube. Before pressing, the base material is forced through seven filters under high pressure. All inner tubes are placed in a vulcanization mold and inflated. Only this guarantees a uniform wall thickness and high air stability.

All inner tubes are inflated and tested for air stability for 24 hours. Then each inner tube is carefully inspected, including visually. Schwalbe inner tubes have been appreciated by German bicycle dealers for their high reliability for many years.

The inner tube is suitable for a wide range of tires thanks to its high elasticity and quality. Inner tube No. 17 works with tires with a width of 28 to 47 mm - a great advantage for stocking in the store. At the same time, it is proof of the quality of the tube.

All valves are nickel-plated and threaded. The valve core is always replaceable. Schwalbe tubes with the classic cyclo valve can be pressure tested because they have a high-pressure valve core.

Every Schwalbe tube is 100% recyclable. We can use recycled material in the production of new tubes without losing quality. We have developed a special devulcanization process in our factory and it has been very successful for several years. Currently, every standard Schwalbe tube consists of 20% recycled old tubes.

When all transport routes are taken into account, the energy balance is positive. Only a fifth of the energy is used compared to the production of new butyl.

WHAT ARE THE ADVANTAGES OF LATEX TUBE?
Tubes made of latex are more flexible than conventional butyl tubes. This makes them slightly lighter. Their biggest advantage is the high level of puncture protection. The highly elastic latex material is very difficult to puncture.

The disadvantage is the poor air stability. A tire with a latex inner tube must be inflated to the correct pressure before each ride. This explains why latex inner tubes are not suitable for everyday use.

In addition, latex inner tubes are very delicate and sensitive to oil, daylight, heat and uneven expansion. The inner tube must be replaced every time the tire is changed.

Since these properties lead to many problems, latex inner tubes are not in our offer.