The mounts to the frame for the hitch box out a smaller area for the spare to fit into under there.

The OR comes with 32's, so they should be fine for the spare, as they come with that size there already. (All that year X's are the same hitch, etc...)

33's need one more inch overall, or a half in in each direction, to fit.

Deflating the 33 would allow it to loose several inches of diameter if need be, way smaller than the inflated 32's....so should be pretty easy to merely drain 10 psi or so, and cram it up there.

That might even be a reasonable psi for offroad work, so it may even be convenient.