Ideal Size for Diamond Racing Steelies

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  • ramielm
    Wrencher
    • Jul 2012
    • 255

    #1

    Ideal Size for Diamond Racing Steelies

    I've been researching this for about 2 days and there are so many different answers that I'm confused!

    My Car:
    1991 vert, H&R cup kit and M3 offset control arm bushings

    What I believe:
    for a 16x8 rim, the ideal offsets would be +12(5" Backspacing) and +0(4.5" Backspacing)

    With these fitments, I would have to grind down my caliper bracket and they would fit fine and flush.

    I don't want to destroy my fenders.

    Questions
    Is this the ideal fitment?

    What is the best size tire to run (I don't want to stretch the shit out of my tire)

    If I grind my bracket down I won't need a spacer correct?
  • Blackout
    R3V Elite
    • Apr 2011
    • 4125

    #2
    Originally posted by ramielm
    I don't want to destroy my fenders.

    I don't want to stretch the shit out of my tire.
    ?
    Pick one...
    » PARTS FOR SALE
    » TRANSACTION FEEDBACK

    Comment

    • Mystikal
      Moderator
      Wheel Fitment Expert
      • Nov 2003
      • 9602

      #3
      +12 205/45. Done

      Comment

      • CW325
        E30 Fanatic
        • Jul 2011
        • 1434

        #4
        You wont be able to get away with just grinding down your caliper bracket, you will need to completely cut it off if you want to run no spacers.

        Comment

        • ramielm
          Wrencher
          • Jul 2012
          • 255

          #5
          well just an update for those interested - I went with 16x8 +12 all around - 5 mm spacer up front - and had to grind my front caliper brackets. They sit pretty flush, and the fronts poke out a TINY bit, hardly noticeable.

          Comment

          • e30_frisco89
            Noobie
            • Sep 2012
            • 8

            #6
            how much do you have to grind the front caliper brackets so it can clear?

            Comment

            • CW325
              E30 Fanatic
              • Jul 2011
              • 1434

              #7
              Originally posted by e30_frisco89
              how much do you have to grind the front caliper brackets so it can clear?
              If you want to run no spacer than they need to be cut off, If your running a 5mm spacer you'll only have to grind maybe like 5mm off the brackets.

              Comment

              • Cletonius
                R3VLimited
                • Oct 2010
                • 2809

                #8
                Originally posted by e30_frisco89
                how much do you have to grind the front caliper brackets so it can clear?
                Maybe I'm missing something but how can this be ground completely off and you still have brakes?
                - Josh
                1990 325is

                Need a shift boot?
                Looking to buy shift boot frames, PM if you have one to sell

                Here's what happens when you let the internet pick your license plate

                Comment

                • CW325
                  E30 Fanatic
                  • Jul 2011
                  • 1434

                  #9
                  The caliper is attatched to the back with 2 bolts. The part that needs to be ground off is the "[" shaped reinforcement on the front.

                  Heres a pic. The red part I boxed is what is cut off

                  Comment

                  • Cletonius
                    R3VLimited
                    • Oct 2010
                    • 2809

                    #10
                    Crazy stuff, I don't think I could bring myself to cut that off. I would consider grinding it down. Can't you just use larger spacers? Toss some flares on and go nuts.
                    - Josh
                    1990 325is

                    Need a shift boot?
                    Looking to buy shift boot frames, PM if you have one to sell

                    Here's what happens when you let the internet pick your license plate

                    Comment

                    • e30_frisco89
                      Noobie
                      • Sep 2012
                      • 8

                      #11
                      CW325 ok thanks and yes i will be using 5mm spacers or can i just run a 10mm spacers without grinding the caliper bracket down?
                      Last edited by e30_frisco89; 09-24-2012, 03:51 PM.

                      Comment

                      • e30_frisco89
                        Noobie
                        • Sep 2012
                        • 8

                        #12
                        Originally posted by Cletonius
                        Maybe I'm missing something but how can this be ground completely off and you still have brakes?
                        I never said i was going to completely grind the caliper bracket off.

                        Comment

                        • ramielm
                          Wrencher
                          • Jul 2012
                          • 255

                          #13
                          you're most likely still going to have to grind a little bit even with 10mm

                          Originally posted by e30_frisco89
                          CW325 ok thanks and yes i will be using 5mm spacers or can i just run a 10mm spacers without grinding the caliper bracket down?

                          Comment

                          • Cletonius
                            R3VLimited
                            • Oct 2010
                            • 2809

                            #14
                            Originally posted by e30_frisco89
                            I never said i was going to completely grind the caliper bracket off.
                            You didn't but it was suggested. I was curious where the grinding was happening.
                            - Josh
                            1990 325is

                            Need a shift boot?
                            Looking to buy shift boot frames, PM if you have one to sell

                            Here's what happens when you let the internet pick your license plate

                            Comment

                            • CW325
                              E30 Fanatic
                              • Jul 2011
                              • 1434

                              #15
                              I believe 12mm is the minimum size spacer you can run without doing any grinding.

                              Comment

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