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

wheels size

Discussion in 'Handling' started by DAF, May 22, 2005.

  1. DAF

    DAF Member

    Joined:
    May 20, 2004
    Messages:
    156
    Likes Received:
    0
    what size are my origanal rs4 wheels 225/45/17 are they 7.5 or 8.5 wide
     
  2. Google AdSense Guest Advertisement



    to hide this advert.
  3. jojo

    jojo Looking for Boost!
    Staff Member Moderator quattro Audi S3

    Joined:
    Sep 4, 2003
    Messages:
    27,334
    Likes Received:
    2,432
    I would have thought they were either 7" or 7.5" wide for 17" wheels.
     
  4. dcallaghan

    dcallaghan Member

    Joined:
    Oct 2, 2004
    Messages:
    41
    Likes Received:
    0
    The 225 in your 225/45/17 gives the width of the suitable tyre. Converting this into inches gives 8.85 inches, so I guess the wheels are 8.5 inches.

    The 45 gives the sidewall height expressed as a percentage of the width. Thus the sidewall height is 225*0.45 = 101.25mm. As you are probably aware, the 17 is the wheel diameter in inches.

    The tyre diameter should then be 17 * 25.4 = 431.8 + (2 * 101.25) = 634.3mm
     

Share This Page