Abstract: A radial tire and a three-step process for making the radial tire. In the first step an intermediate tire assembly is made by assembling a carcass and side rubber layers. In the second step a green case is made by flexing the intermediate tire assembly and mounting a breaker and a tread rubber layer on the carcass. In the third step the green case is vulcanized. The tread rubber layer has edge portions made of the same rubber material as the side rubber layers.

Abstract: A pneumatic radial tire includes a carcass means having at least one rubberized carcass ply consisting of cords disposed at 70.degree. to 90.degree. to the equatorial direction of the tire, a pair of flexible side rubber layers secured to the carcass ply and forming the outer covering of the sidewalls, each side rubber layer composed of flexible rubber having a Shore A hardness upon vulcanization of 40.degree. to 55.degree., a rubberized breaker layer and a tread rubber layer secured to the tire crown. The breaker layer consists of cords disposed at 10.degree. to 30.degree. to the equatorial direction of the tire. The tread rubber layer has a width substantially equal to the width of the tire crown and at least a portion of the shoulders and is made of a highly abrasion-resistant hard rubber material with a Shore A hardness upon vulcanization of 55.degree. to 75.degree..