0:00 The 32 psi habit
1:30 Where 32 psi came from
3:18 Dave’s costly tyre mistake
5:24 How pressure changes the contact patch
7:40 The hidden costs of wrong pressure
10:03 Finding your car’s correct pressure
18:04 Temperature, cold checks and warning lights
27:28 Your tyre-pressure checklist

If 32 psi is your default, this video could save your tyres, your fuel and your grip on a wet British road.

I explain where the familiar 32 psi habit came from, why it can be wrong for modern cars, and how incorrect pressure changes tread wear, handling, braking, fuel economy and tyre heat. I also follow Dave, whose regularly checked tyres were still wearing out early because he was using the wrong number.

I show you where to find your car’s recommended pressures, how to use the normal and laden figures, why the tyre sidewall maximum is not a target, and why you should check pressures cold. I also cover temperature changes, TPMS warning lights, digital gauges, nitrogen, portable inflators and electric cars before finishing with a practical checklist.