Sumitomo ST718. FEATURES AND BENEFITS: All weather traction; Enhanced durability; Longer lasting tread life; . OVERVIEW: The Sumitomo ST718 is a highway terrain all season tire manufactured for commercial vehicles. The tire is intended to be mounted on the vehicle's steer axle.The model ensures excellent all weather traction. The special five-rib tread design with the closed shoulder pattern enhances the dry, wet and winter weather road gripping ability. In this manner, the tread design ensures a secure performance in all conditions. The wide circumferential tread grooves prevent hydroplaning by eliminating water and slush from below the tire's footprint. The better hydroplaning resistance and all weather traction boosts the tire's year round performance.The ribbed tread design's constant road contact increases the tire's controllability. It enables the tire to closely follow the road surface, which upgrades the steering responsiveness and driving stability. In this manner, the structure is stabilized against the driving pressure, while the steering is faster and more precise in its responsiveness to the driver's commands. The reinforced internal structure features an all steel casing, which optimizes the tire's shape. It prevents the deformation of the tire's shape and ensures excellent performance in all weather.The ST718 offers a longer lasting tread life. The tread design evenly distributes the driving pressure along the tread area thanks to the tire's constant road contact. The equally spread out forces of acceleration, cornering and braking actively prevent irregular tread wear formations, guaranteeing an extended tread life and tire usability. The special tire compound, on the other hand, actively resists damage from harming the tire's casing. It avoids punctures, scuffing and chipping from shortening the tire's usability. 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.