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Thread: 18" tyres

  1. #1
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    Vehicle : Estate

    Trim : Design

    Engine : 1.9DTH

    Year : 2008

    Mileage : 79000

    Default 18" tyres

    Anyone know the correct tyre size for 18" wheels on a veccy? Im running some 225/40-18 at the mo, they were some old tyres from my old vehicle

    cheers

    barney

  2. #2
    North West Regional Organiser paulvectrac's Avatar
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    Vehicle : vectra

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    Engine : 2.8 v6 turbo

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    Default

    225/45/18 but alot use the same as yiu mate
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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    Regular Member BigWilko's Avatar
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    Default

    You can go 235/40 18 also

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    North West Regional Organiser paulvectrac's Avatar
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    @BigWilko u get my texts mate
    Vectra vxr custome remaps egr deletes dpf and diagnostic work all remaps are custome bench tuning avalible all genuine equipment PM for info

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    Regular Member BigWilko's Avatar
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    Yeah man.

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    I find 235/40/18's tramline alot more than 225's
    may just be me but ive got 235 rear 225 fronts and always feels like the back end gets wobbled around in lorry groves more

  7. #7
    VIP-Member Z80's Avatar
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    Vehicle : Opel Vectra GTS

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    Default

    I actually like the car to drive where I steer, so definitely prefer the 235...

    Anyway, the real concern here is the overall wheel diameter.

    235/40/18 is group 2, while 225/40/18 is group 1.

    If you car was originally equipped with 215/50/17, for instance, they it's group 2 and you shoud go for the 235/40/18. If you prefer to mount 225/40/18, they you'll have to program the car with the Tech2 to setup the new wheels size.

    Of course, if you were equipped with group 1 tyres form factory, the opposite applies.
    Last edited by Z80; 21st February 2013 at 10:32.

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    Full Member merikiito's Avatar
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    First off, 225 40 18 is not a standard tyre fitment so can void your car insurance. Second are they the right load rating for your car, again if incorrect will void your insurance?
    Third they don't look right on the Vectra, way too small under the arches
    Lois Griffin: Peter! You're bribing your daughter with a car?
    Peter Griffin: Ah, c'mon, Lois, isn't 'bribe' just another word for 'love'?

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    Regular Member keith1983's Avatar
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    If you have a tyre place that you use and trust ask them, they should be the experts?

  10. #10
    VIP-Member Z80's Avatar
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    Vehicle : Opel Vectra GTS

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    Oh yes it is.

    225/40/18 - group 1

    235/40/18 - group 2

    Even 225/45/18 - group 2 (though a whopping 1/2 inch larger in diameter). I was puzzled, but it is official.

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