Thanks so much for the reply! I considered getting tires for the first winter and would swap them on the stock wheels until I figured out my wheel situation. But I found the 280 35R20 being the more difficult of the two tires to find a winter tire for.
For the winter, I plan to keep the tires as narrow as I can. It seems like most BMW packages are 9" in the front and 9.5" in the back. Also plan to stay at least 19".
I'm gonna reach out to my dealer to see if these 664 style wheels from the BMW store will fit on the G87.
https://www.shopbmwusa.com/product/6...L-AND-TIRE-SET
They're not identical to the ones from Alloy Wheel Direct being squared off at 9" in the front and rear and it also lists this wheel/part for a G30 5 Series, but I'm reading the BMW parts store is a mess. The winter packages listed on there for the G87 M2 are for the F87 and apparently won't work.
In any case, I'll heed your advice and search the forums for other OEM setups that work on the G87. Thanks again!