Air Pressure: what should I know?
- Check the pressure of all your tyres monthly, including the spare. Even if you don’t see any damage, tyres can lose up to 1 psi – pounds per square inch – every month. This can be accelerated by air leaks due to accidental puncture, leaks in the valve or valve cap, or by wheel malfunction.
- Check your tyre pressure before making a long trip.
- For the best results, check your tyre pressure when the tyres are cool – before driving the car or if it has covered less than 3 KM at low speed.
- If the tyre is hot, add 4-5 psi to the car manufacturer's recommended pressure value or wait until it has cooled down, which is an average of three hours after parking the car.
- Never deflate a hot tyre.
How do I check my tyre pressure?
- Insert the pressure gauge into the valve stem on your tyre.
- The gauge will “pop” out and show a number that coresponds to the internal pressure in the psi number.
- The hissing sound is air escaping the tyre. It shouldn’t affect pressure substantially, unless you hold down the air-pressure gauge for too long
- Compare the measured psi to the recommended psi.
- If the psi is above the recommended number, let air out until they match. If it's below, add air until it reaches the proper number.
Where can I find the recommended pressure for my tyres?
- In the vehicle owner's manual.
- On a sticker on the driver's door or the fuel tank door.
- Do not use the number on your tyre’s sidewall, as this does not indicate the pressure needed in your tyre.
About pressure gauges
- Be careful if you are using a pressure gauge provided in a service station. The pressure gauges are often unreliable.
- Buy a high-quality pressure gauge and check its accuracy with a tyre professional.
Getting it right is important
- Under-inflated or over-inflated tyres can wear down faster than expected, have reduced grip and can consume more fuel. It just takes a few minutes a month to help ensure your safety and the longevity of your tyres.