Tyre pressure is the one maintenance task that every driver can perform themselves — and yet surveys consistently show that millions of UK vehicles are running on incorrectly inflated tyres at any given time. The consequences range from reduced fuel economy to catastrophic tyre failure.
The Effects of Under-Inflation
An under-inflated tyre flexes excessively as it rotates, generating heat — the primary cause of tyre failure. The contact patch widens, increasing rolling resistance and fuel consumption by up to 3% per underinflated tyre. The edges of the tread wear faster than the centre, significantly reducing tyre life. In extreme cases, the build-up of heat causes the tyre to fail completely, with potentially fatal consequences.
The Effects of Over-Inflation
An over-inflated tyre is too rigid, reducing the contact patch and therefore grip. The centre of the tread takes all the wear, creating an uneven wear pattern. The harsher ride transmits more road shock to the suspension, accelerating component wear. Over-inflated tyres are also more susceptible to damage from sharp impacts — a particular concern on West Yorkshire roads where potholes are prevalent.
How to Check and Adjust Tyre Pressure
Check your vehicle handbook or the sticker inside the driver's door for the correct pressures — note that recommended pressures are often different for front and rear tyres, and may differ based on load. Pressures should be checked when tyres are cold. Most petrol stations have air machines, or you can use a portable digital gauge and pump at home. Check pressures at least monthly and before any long journey.
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