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 in the market for years. They feature uniform wall thickness and are round in shape. Their precise joining 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 almost twice as much air pressure over 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 Schwalbe tubes arises from the uniqueness of their rubber composition. To ensure this high quality, each Schwalbe tube is inflated and tested 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 yields 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, Deutsches Ventil
• SV = Sclaverand, Presta, Französisches Ventil (40 mm)

Delivery includes:

• 1 x Schwalbe Tube No.7A
  including valve