Trail Blade Sport Series. Mud-Terrain Sport Passenger Light Truck/SUV tire.* Unique four-lug tread design with an angled shoulder tread featuring both a horizontal and V-shaped sipe* Sidewall tread blades alternate into full integration with the shoulder tread blocks* Built-in stone ejectors* Shoulder blocks feature feature a special pattern embossed into the side of the tread* Heavy-duty 12 ply rated construction, strategically applied for those sizes where the increased load capacity makes the tire suitable for three-quarter and 1-ton trucks* Aids in wet traction, especially while turning* Creates a serrated edge that greatly improves traction in loose surfaces* For enhanced self-cleaning ability* Helps distort sound waves created by the large and deep tread