Open Country A/T from Toyo Tires is an M&S (Mud and Snow) rated tire that offers aggressive wet and snow traction for pickups and SUVs. With rugged good looks, this versatile all-terrain tire provides uncompromised handling, ride comfort and on- and off-road stability. A special siping and tread arrangement provides a smooth, comfortable ride, as well as improved snow traction. The Open Country’s shoulder voids maximize water evacuation for excellent all-terrain traction and stability. In addition to Toyo’s normal limited warranty, the Open Country comes with a 40,000-mile warranty on Light Truck and Metric sizes up to 17 inches. Toyo Tires: Online Information.