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Australian summer heat raises tyre pressure a few psi. How much, why to set pressures cold, and why you must never bleed hot pressure down.

Towing a caravan changes the right tyre pressures for both the tow vehicle and the van. Here’s how to set them correctly, with a weight-based method.

Overinflated tyres wear out in the centre, ride harshly and grip worse — especially in the wet. Here’s what overinflation does and the pressure to follow instead.