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Thread: tyre pressures

  1. #1
    Regular Member waynevvti's Avatar
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    Default tyre pressures

    just changed from 215/50/17 to 225/45/17,wondering what pressure to put in new tyres,garage put in 32psi all round ??

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    Full Member neverlandandy's Avatar
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    double the rim size and add 2 so 17x2=34+2=36psi
    you wont be far off at that

  3. #3
    Regular Member waynevvti's Avatar
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    thanks

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    They'll be the same pressure as the other size.

    The 215 and 225 size have the same pressures next to them in the handbook.

    The recommended pressures for mine is 32 psi all round (2.2 direct), so "17x2=34+2=36psi" are the incorrect tyre pressures for my car.

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    Moderator & Events Assistant paulhb's Avatar
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    I have just looked in the 2007 handbook and for this tyre size on a Y 22 DH saloon/hatch and up to 3 people on ecodrive it says 36psi for front and rear so spot on Andy


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    Regular Member Envy's Avatar
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    36 psi all round for me too. Have even tyre wear so does not seem over inflated.

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    Vehicle : Vauxhall Astra-J

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    Quote Originally Posted by paulhb View Post
    I have just looked in the 2007 handbook and for this tyre size on a Y 22 DH saloon/hatch and up to 3 people on ecodrive it says 36psi for front and rear so spot on Andy

    Depends if you want a firmer ride by setting the pressures at the eco setting. At 32 psi the ride is quite firm enough. At 36 psi I imagine it would rattle my fillings.

    Is the Y 22 DH a typo. I can't find reference to that engine in my Feb 2007 handbook.

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    Moderator & Events Assistant paulhb's Avatar
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    Being overly picky again Dave it was the YH and SE my bad but then it was five to five this morning and if you think 4 psi will knock your fillings out perhaps you need a new dentist because my tyre pressures vary on my TPMS for my 18" rims between 31.5 psi to 38 psi dependant upon the air temperature and the heat in the tyres and my teeth are fine and I use the 2 x rim size + 2. What Andy posted was a good rule of thumb thats all and since 36 is ALSO a recomended tyre pressure for your car in ECO mode he wasn't far wrong was he

  9. #9
    Regular Member Jekyll & Hyde's Avatar
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    Don’t forget to check out the manufactures of the tyres website for air pressures.
    e.g. Vredestein run 2.7/3.0 bar for the 225/45/18size wheels

  10. #10
    VIP-Member Das's Avatar
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    Quote Originally Posted by neverlandandy View Post
    double the rim size and add 2
    I use this way too.

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