Very nice wheels.The 21's seem to be just about right,IMO, in filling up those huge wheel wells on the X6.I don't have any personal experience w/ driving an X6 w/ 21's.I'm sure Adaptive Drive will soak up some of the small bumps.....but w/ those low aspect ratio tires,you'll feel VERY connected to the road.....
Thanks for the pic's! PalBay