The Goodyear Endurance tire is a ST or special purpose trailer tire developed for use on travel trailers, pop-up campers, boat trailers, toy haulers and fifth wheels. Goodyear Endurance trailer tires are designed with durability in mind to help make towing a trailer less stressful by reducing impact-related failures. Special purpose trailer tires are not intended to be used on cars or light trucks. Endurance trailer tires feature a rounded profile to help cushion the trailer's ride, and the symmetric tread design with closely spaced ribs provide constant rubber-to-road contact for straight tracking, dependable highway stability and long-lasting wear.