Tire failure. Figure 1 shows a cross section of a typical pneumatic tire. (Photo: C. Roberts)

The tire bead is a wire structure that aids in securing the tire to the wheel rim. There are three major wire bead designs used in the manufacture of tires: the overlapping splice (weftless) bead, the mono-strand bead and the cable bead. This article deals with the weftless bead, which is prone to damage under certain conditions when mounting a tire. Figure 1 is a cross section of a typical pneumatic tire showing major components.

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