When I first got my '18 Trailhawk I tried to put a full size spare (265/60R18) in the spare tire well, and it was too wide. The cover was about 1 inch from closing @25psi. (tire section width was 10.7)Are you running a full size spare? If so, does it fit in the rear storage bin?
I have a 3.6 V6 Without HD brakes so I went with 17" Rubicon wheels and BFG K02 265/70R17 and a spare that is 245/75R17. The cover closes and I still have room to pack stuff under the floor around the tire (bins will not fit).
The height of all 5 K02 is the same but the section width is 9.8 vs. 10.7.
(the 265/70R17 with NO spacer, do not rub at all, full compression, any ride height, any steering angle - Off Road Tested)
Tirerack.com is a great place to get heights and widths of tires specs. You can copy and paste into excel spreadsheet for quicker comparisons.
Hope This helps