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RSTT alloys

Discussion in 'A3/S3 Forum (8L Chassis)' started by Erf, Feb 28, 2013.

  1. Erf

    Erf Member

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    Hi Guys,

    Might be a dafte question, but...

    I've just agreed to but a set of RSTT's that were being sold in teh classified section, but just noticed the tyre sizes are different. Two are 225 40 18 and the other two are 225 45 18. Is that going to cause me an issue?

    Thanks.
     
    #1 Erf, Feb 28, 2013
    Last edited: Feb 28, 2013
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  3. Jay A3

    Jay A3 #because Racecar
    Team Daytona Audi A3 Manual

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    Both sizes look the same to me
     
  4. hades-

    hades- Yorkshire & Humber Rep.
    Regional Rep VCDS Map User

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    yep and to me
     
  5. Sidey

    Sidey Active Member

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    [​IMG]
     
  6. Vex182

    Vex182 Guess what I drive...

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    Typo in the sizes?
     
  7. Jay A3

    Jay A3 #because Racecar
    Team Daytona Audi A3 Manual

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    i wonder if he meant 235 40 18 or 225 45 18?
     
  8. Erf

    Erf Member

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    Sorry typo! 225 40 18 and 225 45 18!!!!

    Apologies!
     
  9. S3-Si

    S3-Si Member

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    Its been a long day, but I don't see any typo?
     
  10. Erf

    Erf Member

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    I edited the original post to correct the typo.
     
  11. Jay A3

    Jay A3 #because Racecar
    Team Daytona Audi A3 Manual

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    Now all our posts look out of place!
     
  12. Routledge

    Routledge Wind Deflector Trend-setter

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    I thought this.

    It doesn't matter if they have different tyre sizes on the front to the back.. Just as long as they match on the axles.
     
  13. Alex C

    Alex C Well-Known Member
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    that is a ~10cm difference in rolling circumference which is quite a bit. I wouldn't run that.
     
  14. Erf

    Erf Member

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    Buggery...
     
  15. .Ben.

    .Ben. Member

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    Buy some part-worns from eBay in the correct sizes?
     
  16. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

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    different rolling radius from front to rear will cause issues with ESP and haldex... the speed sensors will see the one set of wheels going faster than the others and potentially misinterpret this as wheelspin..

    <tuffty/>
     
  17. Erf

    Erf Member

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    Thanks for all the replies guys. Will stick to stock 17" Avus alloys and get them refurbed.
     
  18. Daniel M

    Daniel M Member

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    Just a quick one related to this, will having say two 225/45/17 tyres and two 205/45/17 tyres cause any problems?
     
  19. <tuffty/>

    <tuffty/> Badger 5 Edition...Its all about the flow...
    Staff Member Moderator Audi S3

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    If the rolling radius is different then yes...

    <tuffty/>
     
  20. Daniel M

    Daniel M Member

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    Ah might need some new tyres then as Ive just discovered my rears are wider than the fronts?! (done before I bought the car). Also what would be the correct width tyre for a 17'' RSTT? 225 or 205?
     
  21. Alex C

    Alex C Well-Known Member
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    standard s3 rims are 17" 7.5" wide. -- 225/45
     

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