Today we're going to take a look at the Contender ST225/75R15 Radial Trailer Tire in a Load Range E. Now, this is a radial ply tire. It's great for highway use. Constructed with double steel belts, double polyester cords and it does use a nylon tread firming belt overlay around the tire to help prevent tread separation. Does offer the tread depth bars, like you'll see in your passenger car tires… see more >