Originally Posted by AndyM
Good idea! What are the pros and cons of the 18" vs. 20" wheels? I suppose more sidewall is better for offroad and the lower profile tire is better on the road. Anything else?
Pretty much. I don't know if the lower profile sidewall matters in practice- the Grand Cherokee is a heavy vehicle with a high center of gravity, and you aren't going to notice the loss of the sharpness in a turn. The Goodyear Fortera HL that's on the 20" rims seems to be a better tire than the Michelin that gets shipped on the 18" rims, so that can potentially matter. But beyond the tire itself and the looks of the rim, I really don't expect any noticeable felt difference.
I added the tow hooks and skid plates later- the plates I had done at the dealer (charged me $200 labor), the hooks I did myself. While I prefer the looks of the 20" rims to the 18" rims in the ORAII package, if you're thinking you might want those goodies on your vehicle, I'd say just to get ORAII and be done with it.