Hunt Adventure Carbon 650b wheelset w/ 2.1" GravelKings. These will be the largest tires I've ridden by far. This is an XL-size frame, so the picture doesn't do it justice as far as how large the tires are. They look almost ridiculously large in person, but I love the appearance.
There is at most 2 mm clearance to the drive-side chainstay. The "new tire" rubber whiskers on the sidewalls fold over, though the wheel spins freely. The tires did add some weight. 20.2 lbs as pictured. Still not too bad. Should be fun.