Weighs 150g. All InnerTubeShop inner tubes are sourced from experienced manufacturers that supply some of the best known premium tyre and cycling brands. We cut out the middlemen to bring you the same product and save your hard earned cash. These innertubes are compatible with the following ETRTO tire sizes: 20" x 1.75" = ETRTO 44-406 20" x 1.8" = ETRTO 47-406 20" x 1.95" = ETRTO 50-406 20" x 2.0" = ETRTO 52-406 20" x 2.1" = ETRTO 54-406 20" x 2.2" = ETRTO 56-406 20" x 2.3" = ETRTO 59-406