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Why does tire failure risk rise sharply during long, hot highway driving?
- A.Hot weather makes rubber stronger
- B.Heat builds inside the tire from flexing and hot pavement, and an underinflated tire flexes more, generating heat faster than it can shed it
- C.Only retread tires fail in heat
- D.Tire heat matters only in the desert
Correct answer
B. Heat builds inside the tire from flexing and hot pavement, and an underinflated tire flexes more, generating heat faster than it can shed it
Why
Every revolution bends the tire's sidewalls, and that work becomes heat; low pressure increases the bending dramatically. Checking pressure when the tire is cold, before driving, is the check that prevents most heat-related blowouts.
Manual topic: Hot Weather - Tire Heat · From the General Knowledge practice bank (GK-316).