Carlisle USA Trail. FEATURES AND BENEFITS: Trailer tire, NOT FOR LIGHT TRUCKS; Enhanced controllability; Boosted durability; All weather traction; . OVERVIEW: The Carlisle USA Trail is a highway terrain, all season bias tire manufactured for trailers. This tire is NOT MEANT TO BE MOUNTED ON LIGHT TRUCKS, as its construction will not support the weight and performing style of such vehicles. It can ONLY BE MOUNTED ON TRAILERS.The tire's bias ply construction enhances its load and driving durability. The bias structure promotes stiffer sidewalls that stabilizes the tire's shape during its performance. This prevents the trailer from swaying while it is towed, which makes the towing vehicle's job easier. This structure also improves the tire's load carrying and withstanding ability. Bias tires have a higher load durability than radial tires, and this tire model is capable of securely performing under the pressure of a heavy weight load.The bias construction and the flat footprint of the tread design work together to increase the tire's controllability. The bias structure stabilizes the tire's structure against the driving and load pressure affecting it, and it lowers the trailer's sway during the drive, which boosts the towing stability. The flat footprint maintains the tire's road contact at all times and it enlarges the tire's road contact area. This boosts the steering response time and accuracy to the towing vehicle's instructions, providing a safer performing capability.The USA Trail features an optimized tread design. The symmetric tread design with the zigzag circumferential grooves enhance the dry, wet and winter weather road gripping ability. The better year round traction enables the tire to securely perform in all conditions. The circumferential grooves improve the water and slush dispersing capability and actively resist hydroplaning, while the zigzag pattern heightens the number of biting edges gripping the road surface. In this manner, the tire guarantees better traction throughout the year. This specific tire model features a BIASED ply construction. There might be discrepancies of sizes between brands and models of tires which have this size formatting. As the manufacturers only provide the tire width and the rim diameter with these tires, various brands and models will have size differences. In order to ensure the correct size is purchased, the overall tire diameter that is needed should be checked.The Overall Diameter or O.D. advertised represents the tire's overall diameter in inches, once the tire has been properly inflated and mounted per the manufacturer's recommendation. This advertised number is provided to Priority Tire by the tire manufacturer. Manufacturers recommend changing tires every 10 years. As long as tires are properly stored before they are sold, the year of their manufacture will not shorten their service life.