Best offset for BBK Clearence.

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  • jules325i
    Grease Monkey
    • Jul 2011
    • 353
    #1

    Best offset for BBK Clearence.

    cant wrap my head around the whole offset thing,
    In limbo about to order wheels for my track car, I'm planing on fitting a Front and rear 310mm BBK From IE, My options are as followed.
    Im happy to run spacers As i have 90mm wheel studs.
    Rota Grids-

    • 16x8 et10
    • 16x8 et0
    • 16x8 et20
    or is there another 16" wheel out there that is better suited and able to run the BBK front and rear.


    329i
    Tags: None
    • mitchlikesbikes
      E30 Modder
      • Dec 2013
      • 858
      #2
      the lower the offset number, the better the clearance. so out of the 3 you posted the et 0 wheels will clear the best, but also stick out further than all the others on the outside.

      1989 Coupe build thread: http://www.r3vlimited.com/board/showthread.php?t=312012
      IG: @mitchlikesbikes

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        • jules325i
          Grease Monkey
          • Jul 2011
          • 353
          #3
          Thankyou, very helpful.


          329i

            Comment

            • MR 325
              Moderator
              • Oct 2003
              • 37825
              #4
              Offset is NOT the only deciding factor in brake clearance. Wheel design is. For example, one set of 16x8 ET20 wheels I had needed a 20mm spacer to clear my UUC brakes. Another set of 16x8 ET20 wheels I used cleared the brakes and left another inch or so between the caliper and spokes. Rota Grid shouldn't be too bad for clearance. If it were me I'd order the ET20 that way you can add spacers IF you need them. ET0 isn't exactly an ideal size for a track car or meaty tire fitment.
              BimmerHeads
              Classic BMW Specialists
              Santa Clarita, CA
              www.BimmerHeads.com

                Comment

                • jules325i
                  Grease Monkey
                  • Jul 2011
                  • 353
                  #5
                  Originally posted by MR 325
                  Offset is NOT the only deciding factor in brake clearance. Wheel design is. For example, one set of 16x8 ET20 wheels I had needed a 20mm spacer to clear my UUC brakes. Another set of 16x8 ET20 wheels I used cleared the brakes and left another inch or so between the caliper and spokes. Rota Grid shouldn't be too bad for clearance. If it were me I'd order the ET20 that way you can add spacers IF you need them. ET0 isn't exactly an ideal size for a track car or meaty tire fitment.
                  Ok that sounds even better, I will be running 225/45/16
                  I wonder if UUC Kit sticks out as far as the the willwoods, is that kit anygood?
                  Last edited by jules325i; 07-18-2014, 01:52 AM.


                  329i

                    Comment

                    • jules325i
                      Grease Monkey
                      • Jul 2011
                      • 353
                      #6
                      Im really hoping that 16x8 et20 rota grid classic will clear Willwoods BBK Front and rear, even if i have to run a 20mm spacer.


                      329i

                        Comment

                        • Randy2400
                          Member
                          • Apr 2014
                          • 55
                          #7
                          Originally posted by jules325i
                          Im really hoping that 16x8 et20 rota grid classic will clear Willwoods BBK Front and rear, even if i have to run a 20mm spacer.
                          Did they clear the bbk? I am in the same situation as you but I have not ordered the wheels yet. Please let me know thanks.

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