Tayar pressure

[Guest Odessus]

Silly question but when you drive to the petrol station' date=' I'm assuming the tires will be hot? How long to cool down in order to pump air?[/quote']

No idea. I don't wait. Just pump and +20/30 to recommended cold tyre pressure to compensate.

[Guest jtang]

Silly question but when you drive to the petrol station' date=' I'm assuming the tires will be hot? How long to cool down in order to pump air?[/quote']

Nothing to be shy about asking, we are happy to share around. Do you keep a tyre pressure gauge in your car? It is an essential tool if you don't have. I'll explain it's use shortly.

When I pump Nitrogen (air in your case) into my tyres, I usually over fill a little more than the recomended pressure. Bearing in mind that the tyres are usually hot by the time I reach the tyre kiosk, the pressure is already higher than cold. If the recommended pressure is 35psi (when cold), pump the hot tyres to 40psi. The reason is tyres heat up and can increase the pressure by as much as 5psi. You will also notice that all four tyres will show different readings as each tyre heats up differently from each other, it depends on your driving stlye & road conditions...eg frequent right turns will heat up left tyres more.

After a night of cooling down, the tyre gauge will now come in handy next. Before moving off the car in the morning, check all 4 tyre pressures. Bleed the air to the recommended (35psi) or preferred pressure using the gauge. It will be helpful if you can get hold of the racing tyre gauge which comes with a button for bleeding air & reading the pressure gauge simultaneously.

You now have right tyre pressure all round when cold. No error from unequal pressure on different tyres as in when hot.