The Schwalbe Tube No.21 fits 27.5" (or 26") tires with a width of 40-62 mm and is used in mountain bikes.

Due to their excellent manufacturing, Schwalbe tubes have proven themselves on the market for years. They have a consistent wall thickness and are round in shape. Their precise construction makes them durable at the seam. A comparative test showed that the Schwalbe tube maintains air pressure significantly longer than other tubes (the others lost nearly twice as much air pressure as the Schwalbe tube in 30 days). A possible reason for this could be a lower butyl content in the other tubes. The special quality of Schwalbe tubes results from the uniqueness of their rubber compound. To ensure this high quality, each Schwalbe tube is inflated and tested for a minimum of 24 hours before leaving the factory.

Features:

• Butyl rubber ensures double the air retention
• 24-hour test for each tube
• High elasticity allows coverage of many tire sizes per tube
• Recycling process achieves a very good energy balance

Suitable for tire sizes including:

40-584 | 26 x 1 5/8 x 1 1/2 | 650 x 38B
40-584 | 27.5 x 1.50 | 650 x 38B
40-584 | 27.5 x 1.50 | 650B
42-584 | 27.5 x 1.60 | 650B
44-584 | 26 x 1 5/8 | 650 x 1/2B
44-584 | 26 x 1 5/8 x 1 2/2 | 650 x 42B
44-584 | 26 x 1 1/2 x 1 5/8 | 650 x 42B
44-584 | 27.5 x 1.65 | 650 x 42B
44-584 | 27.5 x 1.65 | 650B
47-584 | 27.5 x 1.75 | 650 x 45B
47-584 | 27.5 x 1.75 | 650B
50-584 | 27.5 x 2.00 | 650B
54-584 | 26 x 1 1/2 x 2
54-584 | 27.5 x 2.10 | 650B
57-584 | 27.5 x 2.25 | 650B
60-584 | 27.5 x 2.35 | 650B
62-584 | 27.5 x 2.40 | 650B

Valves:

• AV = Auto, Schrader
• DV = Dunlop, Blitz, German valve
• SV = Sclaverand, Presta, French valve (40 mm)

Included in delivery:

• 1 x Schwalbe Tube No.21
  including valve