The tire is usually composed of a tire, inner tube, and pad. There is also no need for inner tubes. The inner layer of the tire has a rubber layer with good airtightness and a special rim. The structure of tires in various countries in the world has developed toward the direction of no-tubes, meridian structures, flatness (small ratio of height to width of the tire section) and light weight.
The tire casing is composed of a carcass, a buffer layer (or belt layer), a tread, a sidewall, and a bead. The casing section can be divided into several separate areas: crown area, shoulder area (tread slope), flexion area (sidewall area), reinforcement area and bead area