I've got a 11 Jku with about 4 inches of lift currently on 35s with aftermarket wheels. 3.73 gears, trimmed fenders, cut pinch seam, aftermarket trackbar. I have a chance to get a set of 37 nittos that I can't turn down. If I'm not wheeling it right now and it's my highway DD should I be ok on stock axels.

 

There are no guarantees, but you should be ok. Definitely have some gussets welded on, even if it never leaves the pavement

 

Been running 37x12.5x16s for 5 months on stock running gear. No issues. Wheeled it a few times pretty hard. Sleeve and gussets are recommended. Artec has a nice truss/gusset/LCS skid kit for $250.

 

How bout width size, the 35s are 12.50 and 37s will be 13.50. They are nitto mud grapplers, is that an extremely heavy tire or about the same as the rest

 

Here we go again!