Yikes on the rings. Wonder why you say terrible about the aluminum. I didn't have any problems with my wife's when I put E70 wheels on her E53.

I maybe recall having to use a wire where to clean rust off the hub before installing but that wasn't a big issue. They were a very precise fit.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)