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C1Difficulty 3/5

When should tyre pressure be measured to compare it with the recommended cold pressure for the load and operating conditions?

Correct answer

With cold tyres, following the applicable recommendation.

With cold tyres, following manufacturer instructions for load, speed and operating conditions. Pressure rises as tyres warm up: a hot reading is a real pressure, but is not directly comparable with the recommended cold value. Do not deflate a hot tyre to match that value or automatically reduce pressure by 10% when carrying a load. For heavy vehicles, follow the appropriate tyre and vehicle tables and procedures.

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  • By deflating hot tyres to the recommended cold value.

  • By always reducing pressure by 10% for full-load driving.

  • With cold tyres, following the applicable recommendation.

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