Hartge wheels are now ordered and I hope that they will arrive before the car
I strongly recommend Kumho tyres since they're really silent and comfortable, had this setup on a F10 that is sold now.
255/35/20 and 275/30/20 or 285/30/20, don't remember right now and the invoice is not here
Starting to change my mind about the wheel-size though, 21" would look a lot better! But nobody really knows how the wheels will sit on the F11, not BMW or Hartge!