Incorrect tyre pressure costs UK drivers money and increases accident risk. Here is everything you need to know about maintaining the right pressures.
Why Tyre Pressure Is Critical for Safety and Economy
Maintaining correct tyre pressure is one of the most important — and most overlooked — aspects of vehicle maintenance. Under-inflated tyres flex more than they should, generating excessive heat that degrades the rubber and can lead to catastrophic blowouts. They also increase rolling resistance, which means your engine has to work harder and fuel consumption rises. Over-inflated tyres, on the other hand, have a smaller contact patch with the road, reducing grip and making the ride harsher.
The correct tyre pressure for your vehicle is specified by the manufacturer and can usually be found on a sticker inside the driver's door jamb, inside the fuel filler flap, or in the owner's manual. Pressures are given in PSI (pounds per square inch) or bar. Most family cars run front tyres at 32–36 PSI and rear tyres at slightly different pressures — always check both axles separately. Note that the recommended pressure may vary depending on load: many vehicles specify a higher pressure when carrying four or more passengers or heavy luggage.
How Often Should You Check Tyre Pressure?
Tyre pressure should be checked at least once a month and before any long journey. Tyres naturally lose around 1 PSI per month even without any puncture. Always check pressures when tyres are cold — driving heats the air inside the tyre, causing pressure to rise, which gives a false high reading. If you have checked pressures after driving, add 4–5 PSI to compensate.
Modern cars fitted from around 2014 onwards are required to have a Tyre Pressure Monitoring System (TPMS) that alerts you when pressure drops significantly below the recommended level. However, TPMS only activates at a substantial pressure drop and should not be relied upon as a substitute for regular manual checks. If your TPMS warning light illuminates, check all four tyres as soon as it is safe to do so, and call Just Mobile Tyres if you discover a puncture or significant pressure loss.
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