Style 189, 8 x 18 (34mm offset) and 8.5 x 18 (37mm), most commonly seen in the U.S. as OE the E92 coupe.
I'm not sure about the very latest, but BMW has been pretty consistent with a 5x120 bolt circle since leaving the 4x100 behind.
What does change in the center bore, more commonly 72.5mm (nominally, but actually 72.56) , but the bigger models have gone larger at times.
The offset varies more frequently, depending on wheel width and chassis application.
Free wheels are nice, but the hassle in situations like this is getting rid of the tires, which unless DIY involves paying someone to dismount and dispose of the tires.