I have seen the mud graps do decent on the highway but after about 10k they are useless in the mud. I got almost 60k out of my Pro Comp Xtreme MT. And they pulled decent for over half their life. Or for an AT I have been really impressed with my Dick Cepeck FC-II
+1 to this. I had a set on my old explorer, had almost 40k on them when I traded them off and they had good tread. The ones bogger is running have been on 2 separate heeps, one of which for over a year as a DD, then his bronco for probly 15k miles and they still have good tread on em. That may be what I end up getting for my truck when the time comes again.
So I decided (or the dumb a$$ that tried to plug the sidewall that I bought the truck from decided for me) to go ahead and get new tires. I went with the Fierce Attitude M/T's and so far I love them. They have VERY good highway manors, smoothest ride I've ever had of any tires. Ill post some pictures soon.