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 bikes, strollers, wheelbarrows, etc. For bicycles that do not have enough space between the hub and rim, a version with a valve angled at 45° is used. Thanks to their excellent manufacturing, Schwalbe tubes have proven themselves in the market for years. They are uniform in wall thickness and round in profile. Due to their precise integration, they are durable at the seam. A comparative test showed that the Schwalbe tube maintains air pressure significantly longer than other tubes (the others lost almost double the air pressure within 30 days compared to the Schwalbe tube). 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 mix. To ensure this high quality, each individual Schwalbe tube is inflated and checked 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 the following 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