Tire question - wheel fitment

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  • Cephas
    E30 Modder
    • Apr 2012
    • 878
    #1

    Tire question - wheel fitment

    Hey all,

    I have 16 inch BBS RX's on my car right now. The tires on the car are Falken Azenis 215/45/zr16. They are old and need to be replaced. I was looking at the BF Goodrich Rival g-forces but noticed that the closest size they come into what I already have is 225/50/16.

    I'm no tire guru, but from what I could gather these should have a sidewall that's 112.5mm vs the on for the Falkens that's 97.5mm right?.
    ..so here comes the stupid question. Will these fit my wheels? The car is lowered on the HR Cup Kit and the fenders have been rolled.

    Thanks for any input!
    Last edited by Cephas; 06-05-2013, 06:37 AM.
    Tags: None
    • MR 325
      Moderator
      • Oct 2003
      • 37828
      #2
      225/50 is too big for an E30. 205/50 or 225/45 would be the correct height tire.

      What width and offset are your wheels?
      BimmerHeads
      Classic BMW Specialists
      Grover Beach, CA
      www.BimmerHeads.com

        Comment

        • mr.vang
          R3V Elite
          • May 2010
          • 4371
          #3
          you need this

          http://www.miata.net/garage/tirecalc.html
          Bought parts from me before? leave your feedback here

            Comment

            • Cephas
              E30 Modder
              • Apr 2012
              • 878
              #4
              Originally posted by MR 325
              225/50 is too big for an E30. 205/50 or 225/45 would be the correct height tire.

              What width and offset are your wheels?
              That's what I was afraid of. They don't seem to make the rivals in that size. What would be the next best tire to the rivals? The car is only driven in the summer on nice days and sees 2-3 HPDE's per year.

              I'll have to check the rim size when I get home. I know it has spacers for the hubs as well, just not sure what size.

                Comment

                • Cephas
                  E30 Modder
                  • Apr 2012
                  • 878
                  #5
                  Ok so wheels say 7J x 16H2 ET35 and the spacers are 100x10 tr108.

                  So can I run a 225 width tire? Also, what would be the best tire available that's comparable to the Rivals?

                    Comment

                    • MR 325
                      Moderator
                      • Oct 2003
                      • 37828
                      #6
                      What size are the spacers? Not understanding those numbers.

                      If the spacers are 10mm (which is my guess) it will be a great fit with 225 tires. You may need a light roll in the rear.
                      BimmerHeads
                      Classic BMW Specialists
                      Grover Beach, CA
                      www.BimmerHeads.com

                        Comment

                        • Cephas
                          E30 Modder
                          • Apr 2012
                          • 878
                          #7
                          Originally posted by MR 325
                          What size are the spacers? Not understanding those numbers.

                          If the spacers are 10mm (which is my guess) it will be a great fit with 225 tires. You may need a light roll in the rear.
                          I think they're 10mm. I'll measure them tonight.

                          I'm having a hell of a time deciding on a tire to buy. I looked on Tirerack and they have the Potenza RE-11's in 205/45/16 on closeout. Those things have great reviews, but am I going to be sacrificing too much traction by going with a 205 over a 225?

                            Comment

                            • Cephas
                              E30 Modder
                              • Apr 2012
                              • 878
                              #8
                              Alright, for anyone following - I went with the Toyo R888's in 225/45/16. They look like they should be very good on the track. Can't wait!

                                Comment

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