i have a +2" lift with castor corrected radius arms etc, i use the standard bumpstops and relocation cones front and rear. currently running 235's but looking at 35 inchers when i do the body lift (tyre clearance) and a further 2" lift using spacers under the spring mounts. so far though, it is very good, though i will need to get wider yokes on the prop shafts when i've finished.