Nitto Dura Grappler Highway Terrain. FEATURES AND BENEFITS: All weather traction; Longer lasting tread life; Reduced road noise levels; Enhanced handling; Dual sidewall design; . OVERVIEW: The Nitto Dura Grappler Highway Terrain is a highway terrain all season tire manufactured for sport utility and light truck vehicles. Nitto offers a 60,000 mile treadwear warranty with this model.The tire promotes excellent all weather traction thanks to the tread pattern. The tread design features waved sipes that firmly grip the road in dry, wet and winter weather. The waved sipes enhance the tread block rigidity which further ensures the all weather road gripping ability. The wide circumferential grooves actively avoid hydroplaning by channeling water and slush from below the tire footprint. The boosted road grip and hydroplaning resistance guarantees a more secure driving experience.The special multi-rib tread design and wear oriented compound extend the tread life. The multi-rib pattern links the tread blocks together, which decreases the tread flexing. This allows the tire to evenly spread the driving pressure out across the tread area, preventing irregular wear patterns from forming in the process. The wear oriented tire compound provides a slower tread wear rate, extending the tread life and usability.The model decreases the road noise heard in the vehicle's cabin. It lowers the road noise with the special tread rigidity and the prevention of tread flexing. They prevent the tread elements from shifting around, which avoids the creation of road noise as the airwaves do not come into contact with the tread elements. The lower road noise levels ensure a comfortable and quiet driving experience.Depending on the tire size, the tread pattern sports a four or five rib design. These ribs firmly grip the road surface and maintain road contact at all times. The constant road contact improves the tire's steering responsiveness and driving stability. The steering becomes quick and precise to the driver's instructions, while the tire is stabilized against the driving pressure affecting it. The upgraded steering responsiveness, accuracy and driving stability guarantee effortless handling and controllability.The Dura Grappler Highway Terrain sports a dual sidewall design. Every Grappler model has two sidewall designs and the driver can choose which they want to be visible on the vehicle. This model's one side has a metal fin design and the other has a traditional design. Even though the sidewalls differ, it does not affect the tire's performing ability.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.