The tire sidewall is just one of several components that make up the standard tire. For example, the bead is a rubber-coated steel cable whose function is to ensure that the tire remains attached to the wheel rim. A tire also has a body that’s comprised of several layers. These different layers are known as plies. Each layer is a different type of fabric. Polyester cord is the most popular ply fabric. Cap piles are extra layers of polyester fabric that some tires contain. Their purpose is to hold everything together. Another important part of the tire is its belt, which is made of steel and is meant to provide reinforcement to the section that’s directly underneath the tread. As for the tread, it’s basically a mixture of various synthetic and natural rubbers. Besides providing lateral stability, the tire sidewall prevents air from escaping and keeps the body plies protected. Some tire sidewalls may contain extra components that serve to increase lateral stability.
In general, the lower the aspect ratio a tire has, the higher its performance level will be. This is due to the fact that tires with a lower aspect ratio tend to have better lateral stability. Whenever a car turns, its tires must overcome the lateral forces that are generated. Tires that have a lower profile tend to have sidewalls that are stiffer and shorter. As a result, such tires are better able to resist these cornering forces.
All of a tire’s components are melded into one with the help of a tire-building machine. This machine is capable of assembling the separate parts of a tire in a precise manner that ensures that each component is located where it needs to be. Once this is done, the machine forms the tire into the size and shape that approximates its final dimensions.