Schwalbe Standard tube Item 13J. For bicylce tires in 26" inch (ETRTO 90/120-559). The Schwalbe tube specifically for fatbikes, with massive volume. For fatbike tires up to 120 mm width. Retains air pressure considerably long. Due to the best material quality and constant wall thickness. Highest reliability. Proven millions of times. Technical Features Item name SV13J Category 26" Size - English 26 x 3,5 - 4,7 ETRTO (90-120x559) Valve Presta (Removable core) Valve length 40 mm Tube material Butyl Weight 390 g Other Made of 20% recycled old tubes