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    Optimal Wheel Size

    I'm toying with the idea of ordering a forged set of wheels, and I can pick the size and offset.

    I'm currently thinking about going 19x9 +30 in the front, and 19x10 +25 in the rear.

    Would run 255/35/19 and 285/30/19

    Not a track car, I just take it on weekend cruises, cars and coffee, shows, and the occasional canyon run. Not looking to run over 2 degrees of camber, shave any fenders, or roll anything.

    Thoughts?
    2004 Dinan S3-R M3
    2023 X3M Competition

    #2
    I would recommend starting at the APEX wheels website, they have all sorts of different sizes/offsets with guidelines for whether it's a direct bolt-on or requires modifications.

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      #3
      18's would be optimal.

      17's would be super optimal.

      19's are for looks.

      If you're adamant on staggered, 18X9 and 18X10 with whatever offsets work for your suspension setup/brakes is ideal.

      I'd stay in the 30's.
      2004 BMW ///M3 Carbon Black/Cinnamon 6MT
      2005 BMW ///M3
      Interlagos Blue/Black 6MT Dinan S3-R

      2008 BMW ///M3 Alpine White/Bamboo/6MT Track Build
      2000 BMW ///M5 Royal Red/Extended Caramel 6MT
      2004 BMW X5 Toledo Blue/Sand Beige 6MT
      2023 Toyota Supra //A91-MT CULG/Hazelnut 6MT


      Instagram

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        #4
        ^^ Sharocks pretty much nailed it.

        I'm running a front 18x9.5 ET35 offset and rear 18x10 ET25.

        Originally, I mounted these with Michelin PSS in 255/35 and 275/35. Fit was very easy, flush, looked great.

        In 2021, I bought new Michelin PS4S in 255/40 and 285/35 due to the national backorder on a lot of tires. I needed them quick, unfortunately. The 285s required slight rear fender rolling.

        Be sure you know what you're getting yourself into with 285s. When it's time to replace these, I'm going back to 275s in the rear.
        Build thread: Topaz Blue to Shark Blue

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          #5
          Sorry guys, forgot to mention I run a 380mm brake setup, I need 19s.

          My current setup is 19x10 +20 in the rear, on 285s and it fits with no rubbing or rolling, so I think the rear will be fine. The front is more what I'm concerned with. I was thinking a 9" wide wheel would work best, instead of 8.5 or 9.5
          2004 Dinan S3-R M3
          2023 X3M Competition

          Comment


            #6
            Originally posted by 9kracing View Post
            Sorry guys, forgot to mention I run a 380mm brake setup, I need 19s.

            My current setup is 19x10 +20 in the rear, on 285s and it fits with no rubbing or rolling, so I think the rear will be fine. The front is more what I'm concerned with. I was thinking a 9" wide wheel would work best, instead of 8.5 or 9.5
            You don't need 19's to clear a 380mm

            Comment


              #7
              Originally posted by fattycharged View Post

              You don't need 19's to clear a 380mm
              That's entirely dependent on your caliper and wheel.

              Either way, 18s are out.
              2004 Dinan S3-R M3
              2023 X3M Competition

              Comment


                #8
                My RAC RG-4's are 19x9 +37 in the front. 245/35/19 fits great in the front. No rubbing and no rolled fenders (@ 13.5" ride height). I suspect 255 would be okay, but I have not tried it.
                Old, not obsolete.

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                  #9
                  Originally posted by D-O View Post
                  My RAC RG-4's are 19x9 +37 in the front. 245/35/19 fits great in the front. No rubbing and no rolled fenders (@ 13.5" ride height). I suspect 255 would be okay, but I have not tried it.


                  That's useful, thanks.

                  Got a pic?
                  2004 Dinan S3-R M3
                  2023 X3M Competition

                  Comment


                    #10
                    Found this old one. She is up on the quickjacks right now getting TCK DA's, so I cannot get any other angles right now.

                    Click image for larger version  Name:	IMG_2054.jpg Views:	0 Size:	274.7 KB ID:	281369
                    Old, not obsolete.

                    Comment


                      #11
                      So those are CSL reps? Look pretty awesome

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                        #12
                        Originally posted by maupineda View Post
                        So those are CSL reps? Look pretty awesome
                        RAC RG4s

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                          #13
                          Originally posted by 9kracing View Post

                          That's entirely dependent on your caliper and wheel.

                          Either way, 18s are out.
                          If you have the Dinan 380mm 6 piston monoblock setup up front, there are a few 18's that will clear them for sure but definitely a lot less options.

                          If it must be on 19's just get 19x9 and 19x10 with whatever offsets work.

                          A narrower wheel up front will help in turn in since you already have more weight up front with the brakes, blower, now 19's with 19 inch tires that also weigh more.
                          2004 BMW ///M3 Carbon Black/Cinnamon 6MT
                          2005 BMW ///M3
                          Interlagos Blue/Black 6MT Dinan S3-R

                          2008 BMW ///M3 Alpine White/Bamboo/6MT Track Build
                          2000 BMW ///M5 Royal Red/Extended Caramel 6MT
                          2004 BMW X5 Toledo Blue/Sand Beige 6MT
                          2023 Toyota Supra //A91-MT CULG/Hazelnut 6MT


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