Non ZTK here. Waiting to hear back from my dealer, but they said they have 17" wheels on 225/50r17 tires that should fit non-ZTK.
Big fat sidewalls, should be good if they can get confirmation from BMW Canada that they will fit..
https://drive.google.com/file/d/1Vp5...ew?usp=sharing
$2350 as well for the set, which isn't bad AT ALL for OEM.