Correct tyre pressure is important for several reasons;

• Tyre life - under or over inflated tyres increase wear
• Fuel economy - under inflated tyres increase fuel consumption
• Safety - under or over inflated tyres will affect grip and braking performance
• Ride comfort - over inflated tyres can result in a harsh and uncomfortable ride

Tyre pressures are quoted for cold tyres and will be specified in your vehicle handbook and may be on a sticker inside the fuel flat, on the drivers (or passengers) door or even inside the glove box.

Normally there are two tyre pressures quoted; one for "normal use" and a higher tyre pressure for when the vehicle is underload. Make sure you adjust your tyre pressures accordingly.

If you don't know the correct tyre pressure for you vehicle, refer to the manufacturer's customer service department.

Never use the tyre pressure quoted on the tyre sidewall. This pressure refers to the maximum inflation pressure a tyre can contain under maximum load.

You should check your tyre pressures every month using a reliable and accurate tyre pressure gauge.

Always measure tyre pressure when tyres are "cold". Tyres are cold if they have not been driven for more than 2 miles at low speed or have been stationary for a least two hours.

The only accurate way to know if your tyres need to be inflated (or deflated) is by measuring the pressure with a reliable and acurate tyre pressure gauge.

A common misconception is that a visual check is sufficient to assess tyre pressure. Tyres can be significantly under or over-inflated by up to 20% and you may not be able to tell just by looking at them.

At the same time as checking your tyre pressure, examine the tyres for any cuts or bulges which must be assessed by a professional if found - a bulge in a tyre indicates internal structural damage and must be replaced.

The tyre must also be replaced if you find any cuts deep enough to reveal the internal structure of the tyre.