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Thread: tyre advise pls

  1. #1
    Regular Member yadziyad's Avatar
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    Default tyre advise pls

    hi i have 18 inch wheels and am just wandering what the best size tyres are for comfort and grip.

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    Regular Member davree's Avatar
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    Vehicle : Insignia

    Trim : SRi

    Engine : 2.0 CDTI (160)

    Year : 2010

    Mileage : 26000

    Default

    The only two sizes you can run without having an adverse affect on your speedo are:

    215/40/18 or 225/40/18

    Personally I would go with 225/40/18 as they are wider (more grip) and will be proportionally thicker (side wall) so more comfortable!!

  3. #3
    Ex-Staff Full Member John LE's Avatar
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    Vehicle : Facelift Insignia/Corsa D

    Trim : LE/VXR

    Engine : 2.0 cdti/1.6 Turbo

    Year : 13/07

    Default

    You could of course go for vauxhalls recommended size of 225/45/R18

  4. #4
    Regular Member davree's Avatar
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    Vehicle : Insignia

    Trim : SRi

    Engine : 2.0 CDTI (160)

    Year : 2010

    Mileage : 26000

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    Quote Originally Posted by john.robertson2 View Post
    You could of course go for vauxhalls recommended size of 225/45/R18
    It depends on what size the original tyres were!!

    If you had 16's on as standard the size would have been 215/55/16 which means using 225/45/18 will put your speedo out by nearly 3% (your speedo would read 60 but you would actually be doing 62).

    Not a massive issue I know but just a heads up!!

  5. #5
    Regular Member m8internet's Avatar
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    Quote Originally Posted by davree View Post
    If you had 16's on as standard the size would have been 215/55/16 which means using 225/45/18 will put your speedo out by nearly 3% (your speedo would read 60 but you would actually be doing 62).
    Not a massive issue I know but just a heads up
    Did you take into account that the speedo overreads by 10% anyway!
    I noticed this when changing from 215/50R17 to 225/45R17, the variance stayed the same!
    I love it when I drive towards "speed warning signs", speedo shows 45 and it flashes 40
    I even had the speedo checked by the calibration method and it was confirmed to be out by 12%

  6. #6
    Regular Member yadziyad's Avatar
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    Default

    it originally had steelies i think they are 16 inch,

  7. #7
    Regular Member yadziyad's Avatar
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    Default

    just checked and the ones on there at the moment are 235/40 r18, so does that mean that my speedo is out. how much should the vx recomended ones cost.

  8. #8
    Admin & Merchandise Manager bigmac's Avatar
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    Vehicle : insignia

    Trim : irmscher

    Engine : 2.0 cdti

    Year : 2009

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    Sorry to hijack thread but if you had 16" steelies on car before and changed to 225 40 18 would you need tech2 ?

    Irmscher Insignia CDTI 130

    MOD'S...Irmscher front spoiler, Irmscher mats, Irmscher door pins, Irmscher rear spoiler, Irmscher grille, Irmscher skirt & exhausts,Irmscher Roof spoiler MOD'S TO COME..Side skirts,Wheels

  9. #9
    Regular Member yadziyad's Avatar
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    Default

    Quote Originally Posted by bigmac View Post
    Sorry to hijack thread but if you had 16" steelies on car before and changed to 225 40 18 would you need tech2 ?
    i dont know i havent had tech 2 done

  10. #10
    Regular Member cerbrious's Avatar
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    Default

    can be changed with tech 2 op com or vaux com to compensate for this

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