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Thread: Tyre pressure

  1. #1
    Regular Member Ralphwells1967's Avatar
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    Default Tyre pressure

    Evening fellow veccers iv had me tyres fitted on me 18" vxr alloys today there 225/45/18 kuhmos was just wondering what tyre pressure to run them on as tyre dealer put them on 35 psi ? many thanks Ralph

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    Full Member Big Sig's Avatar
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    I run mine on 38, but depends on your engine.
    Now I need a turbo to keep up!

  3. #3
    Regular Member Ralphwells1967's Avatar
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    1800 vvti m8

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    Full Member Big Sig's Avatar
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    36-38imo, rule of thumb is double the rim size and add 1psi iirc.
    Now I need a turbo to keep up!

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    Regular Member GSi-Col's Avatar
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    i've just looked to check what i should be running with the same tyres and it should be 39 @ front and 40 @ rear

  6. #6
    Regular Member Steven's Avatar
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    I run mine on 32Psi on my 2.0T

  7. #7
    Regular Member Dan_BlackSRi's Avatar
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    Vehicle : Vectra SRi

    Trim : XP1

    Engine : 1.9 CDTi 150

    Year : 2007

    Mileage : 66000

    Default

    The handbook states 32-33psi, but I find this too low for mine, so I run 36/37psi on my 18's with the same size (and make) tyres.

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    Regular Member GSi-Col's Avatar
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  9. #9
    Full Member Big Sig's Avatar
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    Quote Originally Posted by GSi-Col View Post
    That website is a huge pile of ****e!

    It just told me 31psi for my old 3.0cdti siggy!

    (although it got the gsi right)
    Now I need a turbo to keep up!

  10. #10
    Regular Member john_k_sri's Avatar
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    Vehicle : Vectra

    Trim : SRI NAV XP

    Engine : 1.9 CDTI 150

    Year : 2007

    Mileage : 72K

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    Quote Originally Posted by Big Sig View Post
    That website is a huge pile of ****e!

    It just told me 31psi for my old 3.0cdti siggy!

    (although it got the gsi right)
    Some garages (not to mention VX dealers!) seem to think all Vectra 'C's have the same tyre pressures (usually 32psi). VX Users manual is a good indicator.

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