TWO - New 15x6.00-6 Lawn Mower Tire Inner Tubes for Lawn Tractors Free Shipping!Two New Aftermarket Replacement 15x6. 00 6 Tire Inner Tubes for Lawn Tractors and Mowers This listing includes a set of two (2) new aftermarket replacement tire inner tubes sized 15x6. 00 6, designed for use on riding lawn mowers, lawn and garden tractors, and a wide range of related lawn and garden equipment. Each tube fits a 6 inch rim and features a straight rubber TR13 valve stem. These tubes are compatible with both radial and bias tire