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Thread: Tyres

  1. #1
    Regular Member GSi-Col's Avatar
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    Default Tyres

    Hey just bought a new set of alloys from my mate who had a vec b gsi but rushed in and didn't fully check the tyre sizes on them
    So anyway they look great but only have 215 40 18 tyres on them. Do i need to change them to 225 40 18 or 225 45 18 or just leave them

  2. #2
    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

    225/45/R18 is the recommended size for the Vec but you can use 225/40's and many do.

    I believe depending on the rim you can also use 235/40/R18's hth

    215/40's are a tad small id say and will throw your speedo out a fair bit

  3. #3
    Regular Member Steven's Avatar
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    I think you will be OK fella..

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    Full Member Big Sig's Avatar
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    Depends on how much tread is on them, if they are nearly worn out then change them, if there is plenty of meat on them Then Use them

    Your speedo will be 6.6% too fast, 60mph on your speedo will be 54 mph.
    Now I need a turbo to keep up!

  5. #5
    Regular Member GSi-Col's Avatar
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    Quote Originally Posted by Big Sig View Post
    Depends on how much tread is on them, if they are nearly worn out then change them, if there is plenty of meat on them Then Use them

    Your speedo will be 6.6% too fast, 60mph on your speedo will be 54 mph.
    3 week old Falken FK452's



  6. #6
    Full Member Big Sig's Avatar
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    I'd use them for a little while if it was me

    edit: I got the calculation wrong.

    2.7% too fast

    Speedo reads 60mph your doing 58.4mph

    http://www.miata.net/garage/tirecalc.html

    Put in 17's
    Now I need a turbo to keep up!

  7. #7
    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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    Couldn't you get a bit of cash for them on one of the other forums that the tyre size is relevant to

  8. #8
    Regular Member GSi-Col's Avatar
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    Quote Originally Posted by john.robertson2 View Post
    Couldn't you get a bit of cash for them on one of the other forums that the tyre size is relevant to
    yeah just need to figure out 225 40 or 45's and then the 215's will be for sale on vvoc

  9. #9
    Full Member Big Sig's Avatar
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    TBH unless they look too small i'd use them as they are still a size close to OEM.
    Now I need a turbo to keep up!

  10. #10
    Regular Member Penfold101's Avatar
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    Quote Originally Posted by GSi-Col View Post
    yeah just need to figure out 225 40 or 45's and then the 215's will be for sale on vvoc
    The 45 profile ones are a lot more expensive generally than the 40 ones - hence why a lot of people use them. I've got 235/40's on mine...

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