I'm running the 31x10.5 tires, but haven't measured them yet. great so far in everything I'd put them through, mud, sand, rocks.
grip very nicely on wet roads, too. I guess the siping helps with that. You can definately hear them about 30mph, 50mph if the stereo is on (adult volume, not college volume). No vibes from the tires, and they took very little weight to balance. one tire didn't need any weights at all!
for such a cheap tire, I'm amazed at how well they are doing. put around 3000 miles on them so far. I've heard they have problems with cupping, but nobody I know has personally experienced it. *knocks on wood*