Rubber Master, a product segment of the Countrywide Tire and Rubber brand, was created to be the industry heavy duty inner tube for tires. Rubbermaster tires and inner tubes are the house brand for Countrywide Tire and Rubber.
Designed for specialty tires specifically, Rubber Master was one of the first to offer rounded shoulder structure for lawn and garden tires, which is best suited for zero turn mowers to lessen their impact on turf.