Buy

Tyre size v Rim size

Discussion in 'Technical Q&A' started by jkuk, Apr 5, 2004.

  1. jkuk

    jkuk Formula Junior

    Nov 3, 2003
    259
    Wirral, UK
    Full Name:
    John K
    Guys I have tried the search facility without joy as I know there are lots of threads concerning wheel/tyres.


    Does anyone know the rules concerning rim size versus max tyre size.

    For instance,

    How wide can you safely go with a 7.5J rim or an 8J rim etc.

    Is there a standard calculation that can be used.

    Thanks
     
  2. To remove this ad click here.

  3. Schatten

    Schatten F1 World Champ
    Rossa Subscribed Owner

    Apr 3, 2001
    11,237
    Austin, TX
    Full Name:
    Randy
    yes and no. But the "j" doesn't matter. It's just the 7", 7.5", 8" width of the wheel itself.

    some links to help out:
    http://www.tirerack.com/tires/tiretech/general/size.jsp
    http://www.tirerack.com/tires/tiretech/general/size_information.jsp
    http://www.tirerack.com/tires/tiretech/general/size_conversion.jsp

    great calculator (but for Miata's primarily) here:
    http://www.miata.net/garage/tirecalc.html

    but keep in mind, the most important aspect of buying different tires, even if they are the same sizes, brands/models will differ. For example, for my car, an [Honda] OEM Potenza S02 in 225/50/16 will be much wider than a Pole Position Potenza S02 (which is discontinued btw) of the same size. An OEM tire can be shaped differently and treaded differently.
     

Share This Page