A prior version of the manual (6th edition) specifies:
The
Thule XG-12 Pro have a 12mm inside sidewall and treadface clearance.
The
Super Z6 specified by the later edition manual has a 6.3mm inside sidewall clearance and a 31mm treadface clearance.
Older WK2 owner manuals said "Class S" or better is fine, which is 15mm inside sidewall clearance and 37mm treadface clearance.
I ended up getting some Peerless Auto-Trac #0232105 chains (ratchet auto-tightening). They meet "Class S". They're not as tight to the tire as the Super Z6, so I'm going to test fit in my driveway to make sure there aren't any clearance issues. If there are, I'm going to see if putting Quadra-Lift (air suspension) in Off-Road 1 is enough to clear.
I'm really hoping I don't have to use Super Z6. I hate cables. They just don't give the traction that a real chain does when the stuff is thick and nasty.
I'm in Washington State and the law around here is that when chains are required in the mountain passes, AWD/4WD vehicles with snow tires aren't required to put chains on, but are required to carry them.