Winrun KF997. FEATURES AND BENEFITS: All weather traction; Enhanced controllability; Reduced road noise levels; . OVERVIEW: The Winrun KF997 is a performance and high performance, all season tire manufactured for passenger vehicles and SUVs.The tire promotes excellent all weather traction. The all season tire compound and the directional tread design work together to increase the dry, wet and winter weather road gripping ability. The all season compound keeps its flexibility in all weather, while the detailed tread pattern finds good grip all year. The wide circumferential and swooping grooves effectively resist hydroplaning by eliminating water and slush from below the tire's footprint. The increased road grip and hydroplaning resistance ensure a secure all weather high speed performance.The directional tread design also guarantees exceptional high speed controllability. The tread features a solid center rib with curved edges, directional tread blocks in the center tread and large shoulder tread blocks. They ensure exceptional controllability by improving the steering responsiveness and driving stability. In other words, the steering becomes faster and more precise in its responsiveness to the driver's commands, while the tire's structure is stabilized against the driving pressure affecting it during the drive. The larger shoulder tread elements heighten the number of biting edges that grip the road surface during cornering and maneuvering. In this manner, the directional tread also enables the tire to perform to its highest capability.The KF997 offers a quiet driving experience. The tread design features a dual variable pitch which manages to negate the road noise levels. The pitch sequence generates a sound frequency that cancels the road noise out while the tires are in motion. As a result, the road and tread pattern noise created during the drive does not reach the vehicle's cabin, which guarantees a comfortable and quiet drive. 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.