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Tyre Pressures

Discussion in 'A4/S4 forum(B5 Chassis)' started by Soupie69uk, Oct 30, 2008.

  1. Soupie69uk

    Soupie69uk Owner

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    Hi folks, I was wondering if anyone has had a play about testing different tyre pressures?

    I normally just run the recommended level Audi state but wondered if anyone has found any better pressures.
     
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  3. jcb

    jcb Active Member
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    32 back 30 front on michelin pilot sport 235/40 18's
     
  4. aragorn

    aragorn "Stick a V8 in it!"
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    that seems a bit low?

    Our fuel flap recons 32/32 for the standard 205/55r16 tyres but craigs S4 recons 35/35 for his standard wheels, i presume because of the lower profile tyres and the heavier car?

    your quattro should probably be on higher pressures than a stock FWD...
     
  5. Siena

    Siena Active Member

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    42 / 42.
     
  6. Izzy1

    Izzy1 Vorsprung Durch Technik

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    is that not a little on the high side? also is that pressuse for standard tyres?

    i've got mine at 34 / 34 as recommended by car pressure check thingy.
     
  7. 205man

    205man Active Member

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    im running my around the same 42 front and rear thats what i was told by the company that fitted my wheels with 225/40/18
     
  8. Siena

    Siena Active Member

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    Nope, not too high, perfectly normal.

    [​IMG]
     
  9. aragorn

    aragorn "Stick a V8 in it!"
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    where did you get that sticker from Siena? thats not a stock A4/S4 item? Is it an RS4 one?
     
  10. Siena

    Siena Active Member

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    Ah yes, it's an RS4 sticker.

    I ordered it, fuel grade sticker, along with the in-door barcode stickers, and the airbag replacement stickers, when I was ordering all my RS4 parts pre-surgery.
     
  11. ALPINE

    ALPINE Yes its diesel, now cry u lost

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    i run 32 all round.
     
  12. Oranoco

    Oranoco Well-Known Member

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    Snap. Might hae to up mine a little
     
  13. jcb

    jcb Active Member
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    skits all over the place at anything over 35psi
    used to run 35 all round, 1psi and I can feel it now
    slightly higher rear pressure give a perfect balance of slight oversteer in conjunction with my coilover settings.


    god knows what 42 would feel like with my coilovers! would have no teeth!
     
  14. Fraser

    Fraser Member

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    17s - 36 front 34 back
    18's 38 front 36 back
     
  15. andybnwc

    andybnwc Member

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    this is interesting i used to run 42 42 then was told that it was way too high when puchasing new tyres and put them to 34 34
     
  16. Izzy1

    Izzy1 Vorsprung Durch Technik

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  17. Z82

    Z82 Member

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    18 x 225 x 40

    38 all round
     
  18. aragorn

    aragorn "Stick a V8 in it!"
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    tbh i'd rather believe the pressures audi recommend over what some guys on a forum have set theirs to. The only thing with that RS4 sticker is the pressures are for 255/35's and the 225/40 pressures are for mud and snow tyres, so perhaps not ideal for a road tyre. Be interesting to look at a B6 A4 which had 225/40's as standard and see what it recommends.

    There is a way to check though, iirc it involves using chalk on the tyre and seeing if it wears off faster on the outside or middle.
     
  19. Izzy1

    Izzy1 Vorsprung Durch Technik

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    you willing to try it out? if so let us know of the out come. lol
     
  20. Siena

    Siena Active Member

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    ragorn, I understand.

    But I'm running the pressures for the 255 tyres.

    The M+S 225's are even higher rated, at 48 / 48.
     
  21. Siena

    Siena Active Member

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    ragorn, I understand.

    But I'm running the pressures for the 255 tyres.

    The M+S 225's are even higher rated, at 48 / 48.
     
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  23. aragorn

    aragorn "Stick a V8 in it!"
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    well i'm running 205/55r16's so i doubt thats much help for you...

    Basically you draw a chalk line across the tyre and drive a bit (not sure how far, might only need a few feet, or perhaps a little further) then look at the line. If its worn off at the outside more then its too low, if the middle has worn off its too high. If its all worn off you drove too far ;)
     
  24. aragorn

    aragorn "Stick a V8 in it!"
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    your also running the pressures for 255's with the car fully loaded, ie 5 up and a boot full of luggage... driving about yourself should be using the 36/34 setting...?
     
  25. Siena

    Siena Active Member

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    The fully loaded pressure most of the time, yes.
    Most of the time though, my car has a lot of weight in it.

    The width of the tyres means excessive centre wear due to overinflation is very unlikely to be an issue.

    Underinflation however, will definitely cause problems.
     

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