Originally Posted by jdljeeps
I have a 2003 Rubicon with a 4" lift. It came with 33" tires on it when I bouht it two years ago and they have been great for all the crawling I've ben doing. Other than the bumpers and the lift, the Jeep is stock. What are the largest sized tires I can run without havinG to make any modifications? I've heard that if you go too large you have to modify axles or gearing etc. And do not want to do that. Thanks!
what do you mean without doing any modifications? you've got a 4" lift, that is a major modification. We don't know what 4" lift you have and what components have already been modified so how can we make a tire size recommendation?
with 4" of lift, you can fit anywhere from 33s to 37s depending how you setup your bumpstop extensions & fenders. bumpstop extensions are pretty important, so make sure those are installed and proper length.
also with 4" of lift on a Rubicon, you want a CV rear driveshaft. so if you don't have one, you'll want to get one.
post pictures of the springs, shocks, rear track bar bracket, bumpstops, steering, t-case and rear driveshaft. we can make an intelligent recommendation from there.