The Schwalbe Tube No.1 fits 12 and 12 1/2" tires with a width of 47-62 mm and is used in children’s bicycles, strollers, wheelbarrows, etc. For wheels that do not have enough space between hub and 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 consistent in wall thickness and round in shape. Thanks to their precise fitting, they are durable at the seam. A comparative test found that the Schwalbe tube maintains 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 arises from the uniqueness of their rubber blend. 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 air retention - 24-hour test for each tube - High elasticity allows covering many tire sizes per tube - Recycling process achieves a very good energy balance **Compatible with 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