Trans American 21x12-8 / 22x11-8 Inner Tube with TR-6 Straight Valve Stem 21x12-8 / 22x11-8 inner tube with TR-6 valve stem. For use in radial or bias tires. (21x12R8 , 22x11R8) ISO 9001 certified production and quality you can feel. Perfect for ATV/UTV/lawn and garden use.