I've got 80,000 miles on my BFGoodrich ATs. I could probably run them for another 20-30K. I'm going to replace them soon, mostly because I want to inspect my wheels for rust (no, I'm not kidding).
Every truck in the family (my faux-Hilux, my sister's pickup, my Dad's Taco, my Mom's ranger, my brother's Nissan...) are on the same tires. They are all doing very, very well. They are wearing real well, and none of us has ever had a problem with traction (from New Mexico to Alaska, and everywhere in between).
For me, there's just no other choice. For some reason, they really do well with the 3rd generation Toyotas. I don't want to mess with success.
1991 4x4 Pickup, 2LT-E, R150f
1976 HJ-45 Pickup (needs restoration)
"Who's behind the curtain anyway? Who pulls the levers and tells the lies?"
--Five Iron Frenzy