I have the 305/65R17 Pro Comp Extreme Terrains mounted on 17" Pro Comp wheels with 4.5" back spacing. I have a 3" Pro Comp lift with All Pro UCA's. They have a great look IMHO. Very wide, great traction off road, and seem to be wearing fine at this point. They are LOUD. The one issue I am having right now is that they are rubbing a lot. I have a set of All Pro 1.5" spacers on the way to see if I can at least pull into a parking space again. I will have to do the body mount chop to keep them from rubbing under compression as well. I will post updates as I get things done.