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max %age tyre difference run on a quattro

Discussion in 'A4/S4 forum(B5 Chassis)' started by jcb, Oct 27, 2009.

  1. jcb
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    jcb Active Member

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    just found a screw 1 inch from the side wall in my almost new F1's!!
    pain in the ass as they cost me £100 each and the tyre monkey says he can't plu it to repair them.
    £25 and a 10 day turn around to get them done by a vulcaniser repair guy (no not star trek!!)
    still doesn't help me ....

    I have 245/40/18's all round

    I also have two spare 235/40/18 (total diameter is 1.23% out).
    am I asking for trouble running them temporarily whilst my tyre is being fixed?

    anyone run similar differences?
    #1
  2. ian52
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    ian52 2000 a4 1.8tqs-yellow

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    if you werent doing loads of miles i would think it would be ok. no lsd anyway.
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  3. Soupie69uk
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    Soupie69uk Owner

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    Give me your brakes and you can use my spare 17s?

    Sounds like a plan to me!

    I would just run the 1% difference you have. If it only a couple of weeks I am sure it will be fine.
    #3
  4. jcb
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    jcb Active Member

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    that is what I was thinking...
    #4
  5. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    If you calculate the diameter of both, you'll probably find the difference is similar to the difference between a new 235/40 and a nearly bald 235/40.
    #5
  6. jcb
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    jcb Active Member

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    probably.
    my worry is I will be nearly new 245 on the rear and part worn 235 on the front.
    likely to be closer to 2+% difference if I really think about it
    #6
  7. ian52
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    ian52 2000 a4 1.8tqs-yellow

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    just pump the 235's up to 80psi and put the 245 to 25psi. that should even it out.
    #7

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