The Schwalbe Tube No. 1 is suitable for 12 and 12 1/2" tires with a width of 47-62 mm and is used in children's bicycles, strollers, wheelbarrows, and more. For wheels that do not have sufficient space between the hub and the rim, the variant with a 45° angled valve is used. Due to their excellent manufacturing, Schwalbe tubes have proven themselves in the market for years. They are uniform in wall thickness and round in shape. Thanks to their precise construction, they are durable at the seam. A comparison test showed that the Schwalbe tube maintains air pressure significantly longer than other tubes (the others lost nearly twice as much air pressure over 30 days as the Schwalbe tube). A possible reason for this could be the lower butyl content in the other tubes. The unique quality of Schwalbe tubes arises from the uniqueness of their rubber compound. 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 double the air retention - 24-hour test for each tube - High elasticity allows for coverage of many tire sizes per tube - Recycling process achieves a very good energy balance **Suitable for tire sizes:** 47-203 | 12 x 1.75 47-203 | 12 1/2 x 1.75 47-203 | 12 x 1.90 47-203 | 12 1/2 x 1.90 50-203 | 12 x 2.00 54-203 | 12 x 1.95 54-203 | 12 x 2.10 57-203 | 12 1/2 x 2 1/4 62-203 | 12 1/2 x 2 ¼ | 320 x 57 **Valves:** - AV = Auto, Schrader - AV 45 = Auto, Schrader 45° angled - DV = Dunlop, Blitz, German valve - SV = Sclaverand, Presta, French valve **Delivery includes:** - 1 x Schwalbe Tube No. 1 including valve