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Tyre Pressures 225/40/R18

jaydav2306 Jun 21, 2012

  1. jaydav2306

    jaydav2306 Member

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    Inside the door panel mine is saying 45 psi for fronts and 39 rear!! Can this possibly be right it seems incredibly high??
     
  2. RPB

    RPB Active Member Team Ibis Audi S3 Black Edition DSG

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    I use the 3 person "setting". Lol. 42 front and 33 rear
     
  3. mjr901

    mjr901 Parts Manager - (Main Dealer) Gold Supporter Audi S3 Audi Main Dealer

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  4. jaydav2306

    jaydav2306 Member

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    Just seems a lot!
     
  5. Zak0123

    Zak0123 Active Member

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    Think 45/39 is for mud and sand (M + S). Thinking it should be 42/33?
     
  6. boost-addict

    boost-addict Active Member

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    well im running mine well low, i run 30psi all round. suppose i best put some more air in
     
  7. audicruiser

    audicruiser Audi Heaven

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    Yeah because if you don't you the tyres wear out super quick on the inner edges. Ran our MY2010 car at 30 psi and the front tyres were trashed in 10k miles...

    Each model seems to be different in the pressures but my advise is stick to what it says on your door or fuel flap.
     
  8. boost-addict

    boost-addict Active Member

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    Door shut says 28/29 but then I'm not running stock size wheels for my car. So I just guessed but I should look it up I suppose.
     
  9. SiT

    SiT Member

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    I found 38 front and 31 rear a good compromise between town and A road driving.
     
  10. MTRL

    MTRL Split Grill!

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    I just had 4 new ones put on yesterday, they said I shoud run them at 32. Seems low to me.
    Original wheels were 17 so anything written on the car is no use now.
     
  11. Ste_Nova

    Ste_Nova Active Member

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    its not useless its still a guideline, post your sticker and tyre size
     
  12. JoeyC84

    JoeyC84 New Member

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    That seems too high to me 42 front and 33 rear. Run 32 all round myself and its a smooth ride and handles great
     
  13. audicruiser

    audicruiser Audi Heaven

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    That's too low, you will screw your tyres up.
     
  14. RPB

    RPB Active Member Team Ibis Audi S3 Black Edition DSG

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    Car door sticker clearly says 42 front and 33 rear on my S3 2011
     
  15. renfrew

    renfrew Member

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    Whereas the sticker inside the petrol cap on my 3.2 (sport suspension) clearly states 36 front and 33 rear for my 225x45x17 tyres. The handling has always been up to expectations although I do suffer greater wear on the inside edges but only on the rear tyres (geometry checked and re-checked at different specialists and is correct). I wonder why there is such a disparity between front tyre pressures? I believe that high load factor tyres are specified for the S3, but they're not required for the 3.2.

    Is the difference in front tyre pressures simply because of the lower profile of S3 tyres on 18" rims? I would have expected that the 2.0 engine with turbo in the S3 was no heavier than the 3.2.

    Do specified front tyre pressures differ depending upon whether or not a DSG gearbox is fitted?
     
  16. Ste_Nova

    Ste_Nova Active Member

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    we need a thread of car spec and tyre sticker pics
     
  17. mjr901

    mjr901 Parts Manager - (Main Dealer) Gold Supporter Audi S3 Audi Main Dealer

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