Originally Posted by 6OHVAN
The trimming was for when I was on stock suspension and 35s, I clear the 40s with zero issues, yes they off 5” more inches of ground clearance over 35s...
I don't want to spoil your fun! You are right, the difference from a 35" tire to a 40" is 5" depending on the actual true dimension of the radius of the tire by brand, however your differential ground clearance only increases 2.5". Half the 5" goes to the top and half to the bottom. The real benefits of the bigger tire is two reasons.
1) a wider footprint, which can be gained with brands like Mickey Thompson 36x15.50x your rim size.
2) 5" more radius causing less rolling resistance to roll over obstacles but again clearance gain is only half of the tire size height difference!
I run 36x15.50x15 MT'S on my crawler and 35x12.50x15. I love the MT's because the traction (footprint) grabs more traction but makes me wider for the narrow trails like the Rubicon, especially thru the squeeze where all full & mid size vehicles struggle. You may want to add slide rails near the roof line for your lean at that height. I was running 37" Generals on my 01 7.3 and did not like them went back to 35"s which are fine for what I do.