Currently have a 2016 340 XDrive, M-Sport. It's sitting on square 225/45/18's runflat's with the standard M-Sport Wheels. I'm thinking about upgrading to a set of 437m's off the M3/4's. Obviously, these are a lot larger of a wheel diameter and the wheels are 9" wide in the front, 10" wide in the rear. I'm thinking the discrepancy in the wheel size is going to cause some issues with the transfer case. Anyone have any experience with moving up to these sizes on an XDrive platform?

Thanks!