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Old 01-24-2013, 10:49 AM   #4
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Join Date: Oct 2007
Location: SW Michigan
Posts: 802
My Ride: '99 323i & '00 323iT
Originally Posted by glacket View Post
What are the numbers 72.56 to 74.1 referring to?
Those are the diameters of the center bore, in mm. So, you can use an adapter to make the larger diameter wheel bore (74.1mm) fit on a smaller diameter (72.56) hub.

I have not seen wheels with markings for the center bore.

Most aftermarket wheels have large center bores and require rings to allow them to fit properly. The wheels will be fine with the adapters. And, yes, for the small difference in price, I'd buy the metal ones.

Tip: Before you install, thoroughly clean both the hub and the wheel.
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