Schwalbe AV7 Inner Tube. Durable and reliable, the Schwalbe AV7 is the perfect inner tube for 20"" tyres. Designed to fit a wide range of tyre sizes, this tube ensures consistent performance for everyday cycling, BMX, or trail riding. This inner tube is built for reliability and durability, offering excellent air retention and compatibility across various 20"" tyre sizes. A trusted choice for consistent performance and minimal maintenance. All of Schwalbe's inner tubes are 100% recyclable and are inflated for 24 hours and tested for leaks at the factory before being shipped. Schwalbe inner tubes all have a very high butyl content and a high material purity. AV = Schrader. Weight: 145g. Fits the following tyre sizes: 20x1.50"" (40-406), 20x1.75"" (47-406), 20x2.00"" (50-406), 20x2.10"" (54-406), 20x2.25"" (57-406), 20x2.35"" (60-406), 20x2.40"" (62-406), [20x2.00] (54-428). Valve Type: 40mm Schrader valve for convenient inflation.