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Tyre Pressure Explained: Finding the Right PSI for Your Car

Correct tyre pressure is one of the simplest things to check, yet it has a bigger impact on safety, efficiency, and tyre lifespan than most drivers realise.

5 min read Auckland Tyres Team Updated September 2026

Where to Find Your Recommended Tyre Pressure

Your vehicle's recommended tyre pressure is not the number printed on the tyre's sidewall, that figure shows the maximum pressure the tyre can safely hold. Instead, check the sticker inside the driver's door frame, inside the fuel filler flap, or in your owner's manual.

Common mix-up: the sidewall number is a safety ceiling, not a target. Always use the vehicle manufacturer's figure instead.

Why Tyre Pressure Matters

1

Safety and Handling

Under-inflated tyres flex more, generating heat and increasing blowout risk. Over-inflated tyres reduce the road contact patch, compromising grip.

2

Fuel and Battery Efficiency

Under-inflation increases rolling resistance, meaning your engine or motor works harder, raising fuel use or cutting EV range.

3

Even Tyre Wear

Under-inflation wears the outer edges faster, over-inflation wears the centre faster. Both shorten tyre life.

How to Check Tyre Pressure Correctly

  1. Check when cold

    Ideally before driving, or after the car has been parked for a few hours, since warm tyres give an artificially high reading.

  2. Use a pressure gauge

    Remove the valve cap and press the gauge firmly onto the valve stem.

  3. Compare to your recommended figure

    Check against your vehicle's door sticker or manual, not the tyre sidewall.

  4. Adjust and recheck

    Add or release air as needed, then confirm the reading, including your spare tyre.

Common Tyre Pressure Mistakes

MistakeWhy it matters
Checking pressure when tyres are warmGives an artificially high reading
Using the sidewall maximum figureThat's a safety ceiling, not your vehicle's recommended setting
Ignoring the spare tyreLeaves you unprepared in an emergency
Judging pressure by eyeModern tyres can look fine even when significantly under-inflated

Pressure Light Keeps Coming On?

We'll check for slow punctures and confirm the right pressure settings for your car.

FAQs

Should I use the pressure printed on my tyre?

No, that is the maximum safe pressure, not the recommended running pressure. Use the figure from your door sticker or owner's manual instead.

How often should I check tyre pressure?

At least once a month, and always before a long road trip.

Why is my tyre pressure light coming on repeatedly?

This can indicate a slow puncture, a damaged valve, or normal seasonal pressure changes. It's worth having it checked.