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Thread: Tyre size advice

  1. #1
    Regular Member DARREN R's Avatar
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    Vehicle : vectra

    Trim : sri xp

    Engine : z19dth

    Year : 2008

    Mileage : 93000

    Default Tyre size advice

    Any advice would be appreciated has there been any probs with changing the spec from 215/50/17 to 225/45/17 they just seem to be cheaper ?

  2. #2
    [Ex]Admin Duncan's Avatar
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    Default

    Many threads on this - have a search and you'll find loads. Basically no problem in changing and you'll get more choice of tyres and a little less expensive.

  3. #3
    Regular Member DARREN R's Avatar
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    Vehicle : vectra

    Trim : sri xp

    Engine : z19dth

    Year : 2008

    Mileage : 93000

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    does it handle a bit better ?

  4. #4
    [Ex]Admin Duncan's Avatar
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    You'll feel a slight difference yes due to the stiffer sidewall - nothing major though.

  5. #5
    Regular Member deanos's Avatar
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    Vehicle : Insignia

    Trim : SRi

    Engine : 2.0

    Year : 2011

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    Dosent it affect insurance if you have diffrent tyres on ?

  6. #6
    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

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    Shouldn't do as its a listed size in the owners manual

  7. #7
    Regular Member deanos's Avatar
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    Vehicle : Insignia

    Trim : SRi

    Engine : 2.0

    Year : 2011

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    But you are changing it from when it left the factory, might be worth checking, insurance companys just need the smallest of excuses not to pay out !

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    Vehicle : Vauxhall Astra-J

    Trim : Elite

    Engine : 2.0 CDTi

    Year : 2013

    Default

    Changing to the alternate size will make your speedo over-read. ie, at an indicated 70 mph you'll probably be doing something like 65 mph.

    Also as the tyres are slightly smaller in circumference your mileage will increase slightly more than compared to someone who still has 215/50/17's fitted.

  9. #9
    Regular Member agadore's Avatar
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    I think the dealers can Tech2 to correct for the over-reading when changing to 225/45/17's

  10. #10
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    Try this link and it gives you a good idea of what effect changing tyre size will have on speedo

    http://www.alloywheels.com/tyrecalc.asp

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