The successor to this SV21 is the SV14.
A Schwalbe inner tube retains air pressure significantly longer.
The quality of the components and the purity of the rubber compound distinguish the quality of the inner tube.
SV21
- Wheel diameter: 27.5 inch
- Type: MTB
- Valve type: French valve (Presta, Sclaverand)
- Valve length: 40 mm
- Weight: 205 g
Suitable for the following tire sizes:
40-584
47-584
50-584
54-584
57-584
60-584
62-584
What is special about a Schwalbe inner tube?
Besides the quality of the components, the purity of the rubber compound is what sets the inner tube apart. The raw material is therefore pressed through seven filters under enormous pressure before extraction. All
inner tubes are placed in a mold and inflated before vulcanization. Only this procedure guarantees uniform wall thickness and long-lasting air tightness.
All inner tubes are inflated and stored for 24 hours to test for air tightness. Afterward, each inner tube is carefully inspected individually. The bike trade has valued the Schwalbe inner tube for many years due to its high reliability.
Because of the high elasticity and quality, one inner tube can cover many tire sizes. Inner tube group 17 is just as suitable for a tire width of 28 mm as for a tire width of 47 mm. This is a great advantage for inventory in the bike trade.
All valves are nickel-plated and threaded. The valve insert is always interchangeable. Schwalbe inner tubes with the Dutch bike valve can also be tested for tire pressure and have a high pressure-stable valve seal.
Every Schwalbe inner tube is 100% recyclable. We can use the recycled butyl rubber in the production of new inner tubes without any loss of quality. We have developed our own devulcanization method in our factory. We have been successfully using this method for many years.
Every new Schwalbe standard inner tube consists of 20% recycled raw material. Compared to extracting and transporting new butyl, recycling inner tubes consumes only 20% of the energy.
