What stays are those on the white bike? I would really like to go with the GRX crank, so maybe I'll stick with 44mm tires. Pretty sure I can get that all to fit together.

Already showed the bb shell who's boss just to get the back wide enough to fit a hub in there. The decision is really which end to cut. Cut from the front and that limits the tire. Cut from the back and it limits the crank. I wish I could bend the stays around a little, but my attempts at that didn't work out.