The most common types of tire construction include bias, belted bias, and belted radial. In bias-ply or belted bias-ply tires, the cords decussate each other. These cords are commonly at an angle of 25 to 45 degrees to the tire centerline. Radial-ply tires are arranged radially at a right angle to the tire centerline. Steel belts are most commonly used in radial tires, but other materials namely fiberglass, nylon, and rayon have also been used. A large number of radial tires have two plies and two belts. Radial tires provide better steering characteristics, less rolling resistance, and longer tread life than bias-ply tires.