I got the
OZ SUPERTURISMO DAKAR wheels with OEM sized 245/45R20 Pirelli Scorpion Winter tires, and they look really nice. As people stated, the tires fit just fine (look at the specs section of the tire), but they don't protrude as much as they would on narrower wheels, so there is a better chance of scratches.
The only issue I have (if you can call that a problem) is that the center hub is slightly bigger (70mm?) than OEM, so the wheels will have OZ logo, instead of BMW.