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    Wheel Hub Question

    Hey all,

    I just purchased a 91 318ic. It came with some aftermarket discount tire 4x100 17inch wheels. I purchased some stock bottle caps to bring it back to original condition. Go to put the wheel on and it won’t fit. The hub measured 70mm.

    is it common for someone to install a new wheel hub that isn’t oem? I assume my only option for stock is to purchase original hub / bearing?
    http://www.DeluxeCarStorage.com
    87 325ic - Early ACS Tribute
    90 325i MT2 - R.I.P


    Seller Feedback: http://www.r3vlimited.com/board/showthread.php?t=380908

    #2
    Someone likely installed hubcentric adapter rings to change the size from stock 57.1 to the larger 70mm bore of the aftermarket wheels. The rings may be stuck on the hubs causing your issue.....these rings can be plastic, aluminum, etc.

    Similar to this:

    https://www.ecstuning.com/BMW-E30-32...ic_Rings/70mm/


    Also make certain your lug bolts are compatible with the stock wheels, some aftermarket wheels use a different taper on the face and thus different bolts to match.


    For reference:

    https://www.ecstuning.com/b-genuine-...h/36136781150/

    https://www.fcpeuro.com/products/bmw...wE#description

    Comment


      #3
      Originally posted by mjweimer View Post
      Someone likely installed hubcentric adapter rings to change the size from stock 57.1 to the larger 70mm bore of the aftermarket wheels. The rings may be stuck on the hubs causing your issue.....these rings can be plastic, aluminum, etc.

      Similar to this:

      https://www.ecstuning.com/BMW-E30-32...ic_Rings/70mm/


      Also make certain your lug bolts are compatible with the stock wheels, some aftermarket wheels use a different taper on the face and thus different bolts to match.


      For reference:

      https://www.ecstuning.com/b-genuine-...h/36136781150/

      https://www.fcpeuro.com/products/bmw...wE#description
      thanks for getting back. It doesn’t look like a hub ring. Looks like a spacer with a larger hub? See picture
      Attached Files
      Last edited by allen_t; 11-20-2021, 08:16 AM.
      http://www.DeluxeCarStorage.com
      87 325ic - Early ACS Tribute
      90 325i MT2 - R.I.P


      Seller Feedback: http://www.r3vlimited.com/board/showthread.php?t=380908

      Comment


        #4
        i think it's just stuck. looks like a hub centric spacer.

        Comment


          #5
          OK, same basic principle as the hubcentric ring but with the added thickness of the spacer to make the offset of the aftermarket wheels better fit the car. Removing those spacers should reveal the stock hub.

          If the aluminum has corroded on the back side of the spacer you might have some fun getting them free. Some spacers have slots to help free them up when this happens but others sit flush....hopefully they don't fight you too much.

          Adding to my comments above about the wheel bolt taper, generally with a spacer, the length of the wheel bolt(s) increases to compensate, however it does depend on the thickness of the wheel hub. I mention this only so you know to compare the length to the stock bolts and avoid them rubbing on anything behind the hub. You can get by with a bit more length, but not too much....if they are close, install and then rotate the wheel to listen/feel for interference.

          Comment

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