That's a tough one. 22's on a truck typically suck on anything short of something with mag-ride due to reduced sidewall. In order to install this you must have the at4 suspension first then upgrade to the zr2/at4x. Costly unless you get all the parts used. To get you as close as possible before you buy...drive an at4x understanding that it does have 18s then drive a at4 with 18s. Pay close attention to how the trucks respond to hard braking, hard cuts to the wheel and normal impacts. I think you'll find that you have less nose-dive, flatter cornering and a less disturbed ride with the at4x suspension compared to the at4. Worth it? Depends on how obsessive you are. Positively love my truck now. I can drive fast on horrible roads and my wife doesn't perceive anything except the speed warning. Fly across railroad tracks with little regard to anything. I will be switching back to factory size/weight tires to restore fuel economy/performance lost due to high unsprung mass (LT305/55r20 weigh almost 60lbs each compared to factory @ 40lbs). Haven't towed anything yet but I think the sag will be noticeable with the softer springs.