How is it ensured, under normal circumstances, that the tire remains firmly fixed to the rim without coming off?

Question

DentroTest · Accepted Answer

To prevent the tire from coming off the rim (bead unseating), the tire has the bead in its area of contact with the wheel. Inside the bead there is a rigid ring of inextensible steel wires (bead ring), which fits under pressure against the rim flange when the tire is inflated, ensuring an airtight, mechanically secure fixing that resists lateral and acceleration forces. The other options are incorrect: The sidewall is the lateral part of the tire in charge of absorbing road surface irregularities and providing flexibility; it does not perform the function of anchoring to the wheel. The shoulder is the transition zone between the tread and the sidewall, whose job is to dissipate heat and give support in curves, but it plays no part in holding the tire onto the rim.

How is it ensured, under normal circumstances, that the tire remains firmly fixed to the rim without coming off?

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