The Dutymax tire delivers unmatched durability for heavy-duty applications with a nylon overlay throughout all sizes for strength. Its innovative shoulder design extends tread life and minimizes heat buildup for reliable performance. The combination of a polyester construction with steel belts and a specially formulated tread compound optimizes performance for exceptional wear and a longer tread life. Walmart does not ship tires to PO BOXES. We do offer shipping to any Walmart store, and valid residential or business addresses anywhere in Canada. Walmart.ca carries a huge assortment of trailer tires, car tires, tires for light trucks, SUV tires, all-season tires, automotive tires, all-weather tires, winter tires, snow tires, summer tires, LT tires, tires for CUVs, high performance tires, UHP tires, premium brand tires, and every-day value trailer tires.