The Schwalbe tube No.7A fits 20" tires with a width of 28-37 mm and is used in various applications including children's bikes, unicycles, trailers, folding bikes, BMX, etc.

Due to their excellent manufacturing, Schwalbe tubes have proven themselves on the market for years. They are uniformly thick-walled and round during use. Their precise construction makes them durable at the seam. A comparative test showed: The Schwalbe tube maintains air pressure significantly longer than other tubes (these lost almost twice as much pressure in 30 days as the Schwalbe tube). A possible reason for this could be a lower butyl content in the other tubes. The special quality of the Schwalbe tubes comes from the uniqueness of their rubber mixture. To ensure this high quality, each individual Schwalbe tube is inflated and inspected for at least 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

Compatible with tire sizes:

37-438 | 20 x 1 3/8

28-440 | 500 x 28A
37-440 | 500 x 35A

28-451 | 20 x 1 1/8
37-451 | 20 x 1 3/8 B.S.

Valves:

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

Scope of delivery:

• 1 x Schwalbe tube No.7A
  including valve