Chris NottJMB Retrofits
Results 1 to 10 of 10
  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    Oct 2011
    Location
    Shropshire
    Posts
    11

    S4 tyre pressures? (255/35-19 tyres)

    Hi all,

    Just checked my pressures as I hit first thousand miles in my B8 S4 and was surpirised to find the garage had delivered the car with 48+ psi all round.

    Fitted with 255/35 19 dunlops and i know it says 50 psi max but cany believe thisi s right running pressure. Been thinking the car felt skittish when the power was applied and think i can see why now.

    I've dropped them to 40 front and 38 rear but this is still well over the label on the door jam that says 36 fromt and 33 rear. Car feels alot better on handling and the power steering feels better at low speed too. Guess it was getting confused with the high pressure making it think it was going fast so it reduced the assistance load making it feel heavy and sluggish.

    What does everyone else run?

    Cheers
    Last edited by Warlord2001c; 7th January 2012 at 21:43.
    Audi S4 (B8) 3.0 TFSI S-Tronic, Phantom Black, 19" 5 Spoke Segment, Super Sport Leather Trim, 3G MMI

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    scoTTy's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Essex, UK
    Posts
    1,958
    Are you reading the door jam sticker correctly?

    I have the same size tyres on my A4 and it's the very bottom reading. This has come up before so I happen to have a picture:

    Note : this is not an S4 so it could be different due to weights etc






    Audi recommend you run at the pressures for a full load at all times. They say if it's too hard then reduce to the unloaded pressures.

    I run 39F 44R.

    It sounds like they may have failed to adjust the pressures during the PDI. I think they do set they high to stop the tyres getting flat spots if they're left standing for long periods.

    I've got Dunlops? What have you got on ?
    MY2010 B8 A4 Avant 2.0TFSI quattro S-line Executive
    Honda CBR1100XX Super Blackbird
    Gone : B6 S4 (AMD stage 3), TT (APR), Golf GTi, CBR600F

  4. #3
    1st Gear

    Status
    Offline
    Join Date
    Dec 2009
    Posts
    254
    I have a S4 on the 19" 255-35 Dunlops, I run to the door sticker 36F, 33R.Anyone else?

  5. #4
    scoTTy's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Essex, UK
    Posts
    1,958
    I wonder why the pressure for the S4 is lower than my A4 on the rear? Mine's a quattro avant if that makes any difference.

    What pressures so they say for full load?
    MY2010 B8 A4 Avant 2.0TFSI quattro S-line Executive
    Honda CBR1100XX Super Blackbird
    Gone : B6 S4 (AMD stage 3), TT (APR), Golf GTi, CBR600F

  6. #5
    Reverse Gear

    Status
    Offline
    Join Date
    Oct 2011
    Location
    Shropshire
    Posts
    11
    Hi Scotty,

    Here you go, the label from my S4 door:




    It's running the Dunlop 255/35 R19.

    I think you're right though on the PDI, the car was in the showroom for a week before I bought it so guess they had them pumped to prevent flat spots as you say.

    Really glad I spotted it now though, it was the only thing I wasn't totally happy with on the car.

    Made it feel dissappointing handling wise but its spot on now so well chuffed .

    Cheers
    Audi S4 (B8) 3.0 TFSI S-Tronic, Phantom Black, 19" 5 Spoke Segment, Super Sport Leather Trim, 3G MMI

  7. #6
    scoTTy's Avatar
    6th Gear

    Status
    Offline
    Join Date
    Jan 2003
    Location
    Essex, UK
    Posts
    1,958
    I guess it shows they are all different

    It says this on the DVD manual I got with mine. Not sure if yours says the same :

    "The tyre pressure must be adjusted according to the load the vehicle is carrying. We recommend adhering to the tyre pressure specifications for a maximum load. The tyre inflation pressures are listed on a sticker on the end face of the driver's door. However, if you prefer an extra-smooth ride and the vehicle is not fully loaded, you can select the tyre pressure for a normal load (no more than three people travelling in the vehicle). However, should you wish to drive with a full load you must increase the tyre pressure to the specified maximum.
    Under-inflation or over-inflation will reduce the life of the tyres considerably and also impair the car's handling. Correct inflation pressures are very important, especially at high speeds. The pressures should therefore be checked at least once a month and before starting a journey."
    MY2010 B8 A4 Avant 2.0TFSI quattro S-line Executive
    Honda CBR1100XX Super Blackbird
    Gone : B6 S4 (AMD stage 3), TT (APR), Golf GTi, CBR600F

  8. #7
    techboy42's Avatar
    Reverse Gear

    Status
    Offline
    Join Date
    Jul 2009
    Location
    Isle Of Man
    Posts
    7
    Laughably - my dealer removed my sticker as I had fitted 20" RS4 style wheels on. I have just removed them and fitted 19" and now have got a little confused over the posts above. I am in a 3.0TDi quattro - what would people suggest?

  9. #8
    Reverse Gear

    Status
    Offline
    Join Date
    Oct 2011
    Location
    Shropshire
    Posts
    11
    I'm running 40 all round now on y 19". 255/35. Feels good and erforms well dry,wet or slippery as hell,in this snow lol
    Audi S4 (B8) 3.0 TFSI S-Tronic, Phantom Black, 19" 5 Spoke Segment, Super Sport Leather Trim, 3G MMI

  10. #9
    Just Plain Old's Avatar
    5th Gear

    Status
    Offline
    Join Date
    Jun 2004
    Location
    Warwickshire
    Posts
    1,257
    I run mine at the low end of the scale, (B8 S4) they don't last very long (Pzero rosso) but grip seems about as good as it gets in most conditions......
    In my personal opinion

  11. #10
    6th Gear

    Status
    Offline
    Join Date
    Apr 2009
    Location
    Coventry
    Posts
    2,219
    could try this i suppose.and have a laff at the tyre prices that you can link to
    Tyre Pressure Lookup » Check Your Tyre Pressures for Car Tyres


    a

    Pass me my sock

    Want to help cure cancer? http://folding.stanford.edu/English/HomePage

 

 

Similar Threads

  1. 2 X RS6 19" x 9" wheels ant tyres for sale
    By BOBBIE in forum RS6 Forum
    Replies: 1
    Last Post: 7th December 2011, 08:34
  2. 18x8.5" Keskin KT4 Set of 5 Alloys + Michelin Pilot Sport PS2 18" Tyres
    By ci-ryder in forum For Sale/Wanted - Audi Parts
    Replies: 6
    Last Post: 10th November 2011, 10:03
  3. 19" Audi S6 19X9" Alloys + Stretched Tyres in Anthracite.
    By matt_hilluk in forum For Sale/Wanted - Audi Parts
    Replies: 31
    Last Post: 5th November 2011, 21:53
  4. Replies: 2
    Last Post: 28th April 2009, 14:04

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO