Thought I would post an update to this question. When I received my pickup, it already had a 2" leveling kit in the front and 1.5" spacer block in the back with air bags. I recently purchased LT275/70R18 tires for it to replace the wimpy Goodyear WinterForce P275/65R18's that it came with. Here is a picture of the pickup after getting the new tires mounted. I can say they fit well with no rubbing. Speedometer reads 2 mph fast at 70 now, but still pretty close.