As corrected on another forum, those are not X6M wheels, they are BMW X5 M Performance Style 375 replicas.

The X6M wheels are Style 300.

I used to have Style 375, but found them too busy, and hard to keep clean.
Switched them to Style 300 X6M and loving it.

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2010 X5 35d Black - Full (current)
2012 X1 28i (retired, won't be missed)
2007 335i sedan (retired, and missed)