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Thread: new wheels psi Q

  
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    LIAM-SXI's Avatar
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    new wheels psi Q

    got some new wheels (215, 50, 18 i think) on a 1.8 astra coup what psi should i use?
    thanks!
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    Ffoeg's Avatar
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    the pressure will be the same as with standard wheels

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    cheers (sorry for posting in the wrong forum)
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    Quote Originally Posted by Ffoeg View Post
    the pressure will be the same as with standard wheels
    Might not be the same as I had new tyres put on 215/40/18 with VXL standard pressure in 38psi front & 34psi back and my steering wheel would shake after doing anything over 30 MPH and got worse over 65 MPH. Took it back to the garage and im now runnung 32psi all round.

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    Quote Originally Posted by aaron1980 View Post
    Might not be the same as I had new tyres put on 215/40/18 with VXL standard pressure in 38psi front & 34psi back and my steering wheel would shake after doing anything over 30 MPH and got worse over 65 MPH. Took it back to the garage and im now runnung 32psi all round.
    Well it should always be the same - tyre pressures are calculated based on the vehicles weight - all ur doin is changing the rubber - not the mass of the vehicle

    Irrespective of your experience and adapting the pressures - its still not an accurate asessment

    Only in daft situations such as replacing with a space saver spare then its a different process but for everyday changes u should retain the original pressure.

    As already mentioned in Ffoegs reply above

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    .... coupled to that, you're probably using more fuel and wearing the tyres out quicker runnig that low a pressure on the front

    The fact that you're got a vibration shows you have a problem with the wheels/front end, that the lower pressure is just masking

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    rizo's Avatar
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    in the vauxhall manual it shows different tyre pressures for different sized tyres on the same car.
    Astra VXR - Arden Blue, Diamond cut 19's, Cruise Control, Debaged, Folding Mirrors, CD70 NAVI and CID + Aux-In, Factory Bluetooth, Piano Black Interior Trim, Full Milltek Unresonated Exhaust

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    It does in the older incorrect ones (mine had a addendum sheet with it), but they amemded them in later versions....


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    ASTRASPORT1800's Avatar
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    215/50/18. ? is that not a bit high profile for an astra?
    life's to short to give a damn.

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    rizo's Avatar
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    seems high, my standard 17's are 215/45.
    Astra VXR - Arden Blue, Diamond cut 19's, Cruise Control, Debaged, Folding Mirrors, CD70 NAVI and CID + Aux-In, Factory Bluetooth, Piano Black Interior Trim, Full Milltek Unresonated Exhaust

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