1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Tuning & Tyre widths

Platinum70 Nov 19, 2006

  1. Platinum70

    Platinum70 Member

    194
    0
    16
    Firstly - has anyone heard of RICA engineering software. Seems very popular with Volvo, Ford and Mazda, but they also do all the VAG cars and many others.

    Secondly - can you change tyres for a slightly wider width and if so by how much so as not too have an adverse affect? Still using the same rims.
     
  2. VennyQuattro

    VennyQuattro Member

    52
    0
    6
    There is usually scope for a small width increase, the standard tyre sizes on my 2,5TDiQ are 235/45/17s and the pervious owner has fitted 245s and they seem fine.
     
  3. tommyt2

    tommyt2 Member

    97
    0
    6
    im using 235/40/19s on my 2.5q sport nice side wall and plenty of comfort compared to the usuall 235/35/19 no rubbing or arching only thing is with the 40 profile in this size no one makes them except bridgestone and this size potenza (re050a) isnt cheap 265 euro plus the vat 21% ouch:puke2:
     
  4. Marko

    Marko Member

    202
    0
    16
    There is a trade off between width and handling. There was a very good article in Audi driver re the effect of oversized widths and rims. Some people are actually sacrificing handling and performance for sheer looks! Crazy in my opinion. The wider you go the better lateral grip will be but aqauplaining will become more of an issue.
     
  5. VennyQuattro

    VennyQuattro Member

    52
    0
    6
    Bear in mind that if you increase the profile, you are increasing the running diameter of the wheel which will have an effect on the speedo calibration.

    General rule of thumb:

    16" = 50 profile
    17" = 45 profile
    18" = 40 profile
    19" = 35 profile

    to keep ~ the overall same running diameter
     
  6. arthurfuxake

    arthurfuxake Controversial & Contradictive

    1,308
    0
    36
    Umm, I'd be careful with a generalisation like that.

    a 165/55/16 will not have the same rolling diameter as a 235/55/16 even though the sidewall profile is the same (number wise at least ie 55) The profile number refers to a percentage (50%, 45%, 35%) of the width (195, 205, 235) which is in millimeters.

    Hope that makes sense?:wtf:
     
  7. jdp1962

    jdp1962 Grumpy Old Moderator Staff Member Moderator TFSI Owners Group Team V6 Gold Supporter Team Tornado Audi S4 quattro Black Edition s tronic

    8,415
    2,979
    113
  8. Donald_MacIver

    Donald_MacIver Member

    214
    1
    18
    I would have though a 16" wheel would have a 55 profile tyre rather than a 50 if fitted to an A4.
     

Share This Page