255/75r17 on stock '15 TRD Sport

So I read the intro email with the max tire size on stock suspension, but I've also read a pizza cutter 255/75r17 will fit as well.. Any advice? Follow up questions.. Do I need a front leveling kit to make it fit and are leveling kits even a good idea? Do I need spacers (and don't spacers create stress points in the axles/joints because it pushes the tire further away from the center of mass)

Any info on any of the 30 questions I asked will be helpful! Thanks in advance!

 

Are these the stock size for Jeep Rubicon BFG's? If so, I am pretty sure that they work on stock TRD Sports. I would also like to hear confirmation on this because I would like to pick up a set.

 

Yes it will fit , no don't run spacers , that will increase the rub potential