Trans American 16.9-26 18.4-26 16.9-28 18.4-28 Inner Tube with TR218A Valve Stem 16.9-26, 18.4-26, 16.9-28, 18.4-28 inner tube with TR218A valve stem For use in radial and bias tires. Also fits 16.9R26, 18.4R26, 16.9R28, 18.4R28 and 420/85R26 tires . NSN 2610002697395