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DDifficulty 3/5

After driving, you check the tyres while they are still hot. Their cold pressure before the trip was correct and you observe no damage or other fault symptoms. The reading now exceeds the recommended cold value. What should you do?

After driving, you check the tyres while they are still hot. Their cold pressure before the trip was correct and you observe no damage or other fault symptoms. The reading now exceeds the recommended cold value. What should you do?

Correct answer

Do not deflate them because of that hot reading; recheck when cold.

Pressure rises as a tyre heats up. Do not release air to adjust a hot reading to the recommended cold value. Recheck and adjust when cold according to the manufacturer; a temperature-related rise alone does not establish incorrect inflation. Check damage, leaks or other symptoms before continuing rather than automatically attributing every abnormality to heat.

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  • Do not deflate them because of that hot reading; recheck when cold.

  • Deflate them now to the value recommended for cold tyres.

  • Never recheck their cold pressure during maintenance.

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