Greenball Tow-Master ST Bias S368-380E. FEATURES AND BENEFITS: Trailer tire, NOT FOR LIGHT TRUCKS; Enhanced controllability; Longer lasting tread life; Upgraded durability; . OVERVIEW: The Greenball Tow-Master ST Bias S368-380E is a highway terrain, all season 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 offers an improved load and driving durability. The tire features a stronger bias construction which maintains the model's ideal shape during its performance. The reinforced internal structure improves the load carrying and withstanding ability and power, ensuring a higher load capacity. The stronger durability ensures the tire's safer heavy-duty performance, without allowing the deformation of the tire's optimal shape.The symmetric ribbed tread design enables the tire's constant and close surface contact. The better road contact improves the model's steering responsiveness and driving stability. As a result, the steering becomes faster and more precise in its response to the driver's commands, while the structure is stabilized against the driving pressure affecting the model. This combination guarantees the driver's full control over the vehicle throughout its performance.The Tow-Master ST Bias S368-380E lengthens its usability with the durable structure and the optimal tread design. The tread pattern enables the tire's close road contact, while the stronger structure maintains the optimal tire shape. In this manner, the tire's constant surface contact ensures even pressure distribution. The equally circulated forces of acceleration, cornering and braking actively avoid irregular wear formations across the tread area. This significantly lengthens the tread and service life. This specific tire model features a BIASED ply construction. 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.