I built a custom tire carrier to fit my full size spare. The 265's wont fit under the WK's frame. We modded the whole thing out of old weight lifting equipment we had. The steel is extremely strong and supported the weight of that tire and rim well. The whole build took us about 2 weeks.
A lot of cutting and drilling
Swings out away from the jeep
Drilled into a hitch attachment
Added a light and license plate to the tire carrier
Hanging a bit so we had to add an arm that swings down to support it