this rig has four stock rear springs on it with the rear springs having an extra rear main leaf added with the eyes cut off of the ends, I run 30x9.5's on it for towing and I have three different sets of 33'' tires for it, it gets about 24'' of articulation limited only by the small shocks on it, the 30's are to small to air down but the 33's ride nice when aired down,you have to bend or hammer the body seam over flat to clear the 33's but i run them more than the 30's,just spoa with the ruff kit and a trail tough upper steering arm. which one looks more natural to you?