On a very hot day a driver finds the tyres already over-inflated. What is the risk of driving on?
Answer and explanation
Correct answer: D. A smaller contact patch and blow-out risk
- Step 1: Heat raises tyre pressure further. Step 2. An over-inflated tyre grips less and is more likely to fail. Answer: A smaller contact patch and blow-out risk. Why not the others: Better grip on all surfaces: over-inflation reduces the contact patch and so grip. Lower fuel use only, with no effect on safety: over-inflation has safety effects as well. Quieter driving and a smoother ride: a hard tyre gives a harsher ride, not a smoother one.
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