They aren't forged... But you're welcome to believe what fits your narrative
http://www.realoem.com/bmw/enUS/show...diagId=36_1319
Notice the descriptor states "LIGHT ALLOY RIM?"
Now look at an actual forged wheel from BMW:
http://www.realoem.com/bmw/enUS/show...diagId=36_1542
"ALLOY RIM FORGED." All BMW forged wheels have that descriptor. All cast/flow-formed BMW wheels don't.
These are not forged. None of the OEM wheels for any non-M E9X are forged.
Moreover: if they were, they wouldn't crack so easily like with all non-M 19" wheels for the E9X.