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Thread: Changing Tyre Size

  1. #1
    Regular Member philzi's Avatar
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    Default Changing Tyre Size

    I notice that some of you are changing the size of the tyres from 215/50 17 to 225/45 (I think).

    How does this affect the car and the abs, speedo etc or is this the way to get the greater choice in tyres?

  2. #2
    Regular Member Andy's Avatar
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    i'd also like to know if you can have 225/45 on the fornt axles and 215/50 on the rear?

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    Quote Originally Posted by philzi
    is this the way to get the greater choice in tyres?
    Simply yes .... 225/45 is far more common then 215/50.
    The change in diameter is well within limits, so its no problem.
    The Vectra is approved for both dim by vx/opel.

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    [Ex]Admin Duncan's Avatar
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    Exactly as TechWolf. No need to have the speedo altered, but if a technician was doing something with Tech 2 on your car - you could ask them to switch the tyre size while they are at it.

    Andy - you're probably best asking a tyre specialist. I'd have thought you'd want the wider tyres on the back, but I'm not 100% sure.

    D

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    Quote Originally Posted by Andy
    i'd also like to know if you can have 225/45 on the fornt axles and 215/50 on the rear?

    put it this way, it will not fail the MOT, as long as you have matching tyres/specifications on the same axle line

    but it will not gain any advantage over four tyres the same,

    i take it you only want to change a pair of front tyres,

    in the good old days of rear wheel drive it was common to have larger tyres on the back than the front to ' improve traction ' but those days are gone, lol

    on the plus side....you only have to buy one pair of tyres, and it will also give the car a slightly forward rake to its stance ( making it lover on the front )

    BB


    ps,,,

    i had this thought process last week, but i went with four new 225's , i didnt think the ' look ' would be right, and if you get a puncture on the front, you cant swap around ur wheels for safety reasons ( as you only want the space saver on non steering and non driving wheels ideally )
    Last edited by Brake buster; 4th October 2005 at 10:26.

  6. #6
    Regular Member Andy's Avatar
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    Basically i only need 2 front tyres as the backs are fine. Just wondered if i could get the 225's instead.

  7. #7
    Regular Member blr123's Avatar
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    Hi Andy,

    Here is a link that will give you some info: -

    http://www.tyresave.co.uk/tyresize.html

    The basic rule is that the difference between the rolling circumference of the standard size and the new size MUST NOT be more or less than 3%, you'll see what I mean from the link eh

    Bryan

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    [Ex]Admin Duncan's Avatar
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    Quote Originally Posted by Andy
    Basically i only need 2 front tyres as the backs are fine. Just wondered if i could get the 225's instead.
    That's what I wasn't 100% sure about - maybe need to talk to a tyre specialist. When I got all four tyres done recently, two of them still had a bit of life in them but I changed them so that the appearance was better.

    I don't think there is any reason why you can't have different ones on the front and back. I'd have thought having the 225's on the back would be the better option (bit wider, bit more grip) but something to check with the tyre guys.

    D

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    Regular Member blr123's Avatar
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    Well at work, Michelin, we get tyres FOC.............and sorry but the answer is no .............we can have fitted any size of tyre as long as it is mentioned in the owners manual and you have the correct size wheels ofcourse............however they wouls NEVER fit dif sizes front to rear unless that was standard.

    There is a Michelin help line you can call, it's the same helpline both for the public and suppliers alike............just can't remember the number offhand, I'll get it later today when I go to work if you like?

    Bryan

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    Regular Member blr123's Avatar
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    Oh one other thing you might be interested in is this........at work we can have either Michelin, BFGoodrich or Kleeber fitted, I have on my car the BFG G-Force this is a very nice looking tyre very similar to the Goodyear Eagle F1..............oh and all of the above mentioned makes use Michelin tchnology.............I have done 10,000 on mine and there is still plenty of wear left at least another 6/7000.

    Then ofcourse there is the TWEEL

    http://www.michelinman.com/differenc...01102005a.html

    Bryan

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