How do you know your car tyres are inflated to the correct pressure?

How do you know your car tyres are inflated to the correct pressure?

I’ve just bought my first car, and don’t know the answer. Could you pls help? What tool should I buy to check?

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9 Responses to “How do you know your car tyres are inflated to the correct pressure?”

  1. John I said:

    A tire pressure gage.

  2. puck said:

    You should buy a tire pressure gauge. Less than 5 bucks at the auto parts store.

    When you go to a gas station, the air pumps there should have one on the nozzle. It may or may not be accurate.

    Attach the nozzle to your valve stem, the little gauge will pop out and that tells you the pressure.

    On the sidewall of your tire, it will say the inflation pressure in pounds.

  3. Carl S said:

    There should be a sticker on the inside of your driver’s door with the correct pressure for your tires. it should read 32/34 or someting like that. Which means front tires 32psig back tires 34psig.

    Use a tire guage or a mechanic to confirm these readings. Checking often will lower the tire pressure – so check once a month and do it near a compression station or home-compressor.

  4. fatj said:

    On your tire you will see its max PSI (usually 44). However, it is best to keep your tires inflated at 35-40 PSI as the air heats up when your tires spin causing them to gain PSI (goes down we you stop driving).

    Use a tire gauge to check your tires current PSI (digital read-out gauges work best).

    PSI = pounds per square inch

  5. Austin C said:

    Most (99.9%) cars tell you somewhere on the car what they should be inflated too, either on one of the door jams, the inside of the trunk, and/or in the manual. They will most likely give you cold tire pressure, meaning they haven’t been driven on for more than a mile in the last hour or so. Standard car tire is a bout 30 psi. Using a gauge, you can then tell whether to add or remove air. Too much pressure will increase chances of a blowout, cause the tire to wear in the middle because it is in more contact than the rest of the tire, and decreases mileage. Too little pressure, causes it to wear on the outside, and increases chances of blowout and decreases mileage.

  6. Dave B said:

    go to someone like halfords and purchase a tyre pressure gauge, remove the valve cap on the wheel,press the pressure gauge onto the valve hard-you will hear a small hiss, immediately remove the gauge and look at the face of it, you will see the needle has moved and whatever figure it lines up with is the pressure in that particular tyre,do this on all wheels and then the spare.

  7. vrrJT3 said:

    The manufacturer recommended pressure applies to the original tire. If you put another tire on it, then the optimum pressure is likely different.

    If you have access to a skidpad and a stopwatch, you could experiment with different pressures to see what the best pressure is for the fastest lap around the skidpad. This is close to the optimum pressure. You could then see what the optimum pressure is for panic stops.

    Road racers measure the temperature across the tire to see if the temperature is even across the tire. If the center is hotter, the pressure is too high. If the edges are hotter, the pressure is too low. If one side of the tire is too hot, the camber needs adjusting.

  8. Tedward said:

    Pressure gauge but some are woefully inaccurate. Your manual will have the correct ratings for the tyre size.

    Review of a few in the link below.

  9. Pat Nicoll said:

    First: while the recommended tire pressure may be on one of the door jambs, the tires on the vehicle may be different than the tires the manufacturer installed, so it would be better to look on the tire for recommended pressure
    Second: most reputable independent auto repair shops will not only check tire pressure but rotate the tires for free during an oil change. Rotating tires is as important as pressure for maximum life of the tires. If you change your oil every 3,000 to 5,000 miles this should be adequate. You can always check pressure more often and the auto repair shop should also be willing to do this for you at no charge if you are a regular customer




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