The Schwalbe tube No. 21F fits 27.5" or 27.5+" tires with a width of 54-75 mm and is typically used in mountain bikes.

The Schwalbe Freeride stands out due to its large volume at a low weight.

Thanks to their excellent manufacturing, Schwalbe tubes have been successful in the market for years. They maintain consistent wall thickness and are round in shape. Their precise construction makes the seam durable. A comparative test found that the Schwalbe tube holds air pressure significantly longer than other tubes (the others lost almost twice as much air pressure as the Schwalbe tube over 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 individual Schwalbe tube is inflated and checked for at least 24 hours before leaving the factory.

Features:

• Freeride – low weight (200 g)
• 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

Fits, among others, the following tire sizes:

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
64-584 | 27.5 x 2.50 | 650B
65-584 | 27.5 x 2.60 | 650B
70-584 | 27.5 x 2.75 | 650B
70-584 | 27.5 x 2.80 | 650B
74-584 | 27.5 x 2.90 | 650B
75-584 | 27.5 x 3.00 | 650B

Valves:

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

Included:

• 1 x Schwalbe tube No. 21F
  including valve