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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.

Under-inflated tyres burn more fuel — about 0.3% economy lost per 1% low. See what soft tyres really cost and why placard pressure is the cheapest saving.