The Grand Treks that came with my 2003 Tundra lasted almost 40,000 miles. I put on a set of Toyo Open Country ATs and they handled pretty good in the snowstorm on the way home.
I'm surprised that the BFG Rugged Trails wore out so quickly. I have them on my Tacoma with 48,000 on them and they still have quite a bit more tread to go. If I had to guess, I'd say they appear to be 60-65% worn at this point.
I just repleaced the original tires on my Ford ranger with Michelins. BJ's had em with a $60.00 ebate for four tires bought. My mechanic told me to buy there because he cannot beat thier prices.
Swimmer a.k.a. YO YO MA
Serial Mailbox Killer/Seal Fisherman