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, and BMX. Thanks to their excellent manufacturing, Schwalbe tubes have proven themselves in the market for years. They are uniform in wall thickness and round in shape. Due to their precise construction, they are durable at the seams. A comparative test showed that the Schwalbe tube maintains air pressure significantly longer than other tubes, which lost almost twice as much air pressure in 30 days. A possible reason for this could be a lower butyl content in the other tubes. The special quality of Schwalbe tubes comes from the uniqueness of their rubber mixture. To ensure this high quality, each individual Schwalbe tube is inflated and tested for at least 24 hours before leaving the factory.

Features:

• Butyl rubber ensures twice 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 the following 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.

Delivery includes: 1 x Schwalbe Tube No. 7A including valve.