$T20Ƽ/7ƼD1Ƽ Trailer Tires: Tire Load Range: C = 6 Ply Construction; Rim Diameter: 15", Rim Width: 5", Bolt Pattern = 5 lugs on 4.5". Built-in rim endows the tire with great strength and support, so the tire won't easily deform. And the tire is easy to install. Bias ply tires are built with thick, durable nylon cords that are positioned at a 30- to 45- degree angle to the direction of travel. The layers alternate in a crisscross pattern, making the sidewalls stiffer so that the entire tire is able to flex easily. Refer to your existing tire sidewall and/or trailer owner's manual to determine the appropriate tire size and load capacity for your application. 1-Years Warranty, Rim included. The $T20Ƽ/7ƼD1Ƽ trailer tire meets Department of Transportation specifications.