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Thread: 18" tyre pressure ?

  1. #1
    Regular Member sparkysbandit's Avatar
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    Default 18" tyre pressure ?

    can anyone advise me as to the best pressure to run on my newly fitted and very cheep 18" wheels 225/40/18



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    Moderator & Events Assistant paulhb's Avatar
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    Vehicle : M5

    Trim : Nothing needs adding

    Engine : 5.0 V10

    Year : 07

    Mileage : 37000

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    General rule used by most on here is 2 psi per inch plus 2 which for you as me is 38, been doing this for years and it works well. Also depends on when you inflate my TPMS shows when the tyres are warm around 39.5 psi when cold like this morning 33.5 psi
    Last edited by paulhb; 19th July 2011 at 22:00.

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    Regular Member GSi-Col's Avatar
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    running mine @ 40 psi

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    Regular Member Marcosuk's Avatar
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    Quote Originally Posted by GSi-Col View Post
    running mine @ 40 psi
    Im surprised you don't float down the road...lol...

  5. #5
    Regular Member sparkysbandit's Avatar
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    cheers guys

  6. #6
    Regular Member Jonsey's Avatar
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    I run with 38psi all round in mine, but put 40psi in the rears when towing the caravan

  7. #7
    Regular Member Wolflinn's Avatar
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    36psi

  8. #8
    Regular Member sparkysbandit's Avatar
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    36 to 38 psi seems to be the general rule of thumb...

    spoke to a few guys at tyre places and they were suggesting as low as 30psi

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