Set of 2. ST175/80D13 tire-and-wheel assembly for the trailer - SW 6.97inch; OD 24.02inch; Tread depth 6mm; Max Load 1377LBS; Pressure 50PSI; Load speed M; Load Range C=6PLY. Premium rubber-compound materials, double steel belts, and full nylon plies combine for superior function and long life. With an exquisite pattern on the tire, it has a great anti-slipping feature. Bias ply tires are built with thick, durable nylon cords that are The layers alternate in a crisscross pattern, making the sidewalls stiffer so that the entire tire is able to flex easily. Rim is not included. Refer to your existing tire sidewall and/or trailer owner's manual to determine the appropriate tire size and load capacity for your application. Specifications: Tire: ST175/80D13 Tire.