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Thread: Tyre Pressures 225/40 18

  1. #1
    Regular Member aaruck's Avatar
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    Vehicle : Insignia

    Trim : SRi



    Default Tyre Pressures 225/40 18

    Can anyone tell me the tyre pressures for this tyre size?
    Thanks

  2. #2
    Regular Member littlesxi's Avatar
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    they are usually 32 all round depending on which tyres you have on!

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    Regular Member MysteryElite's Avatar
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    Depends on the model and weight as well, for example standard size (215/50 17) on the 3.2 are something like 40PSI for standard loading.

    For the big engined diesels it will be extra load tyres and quite possibly higher again.

    I would hope your tyre/wheel supplier could help especially if this is a non-standard size for the model of the car.

    Edit: OK your profile is GSi so I suspect you would be on the higer side.

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    I'm having that size on and I put 32 all around as I checked it with the up-to-date Autodata system. I'm always updated as I work with this system and tyres everyday. Hope this helps mate.

  5. #5
    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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    32 all round is OK for 1.8 but User Manual specifies 41 all round for 3.2 engine which is in the GSI. Garages and even dealers often put 32 all round on Vectras which require higher pressures. My 2.0T requires 35 all round.
    Last edited by john_k_sri; 31st January 2008 at 11:47. Reason: additions

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