i wheeled with a rig that had teh currie setup with 12" 2" saw's and the currie 4" rear springs, cant remember if it had a 1 3/4 spacer on top too, but for some reason i think it did. anyhow it wheeled very well. he seemed very happy too. he did say they usually run a 10" though. i have 2" in the front of my tj and havent had any problems.