BFG Long trail AT's. Got the truck at 153K and I am at 192k. Still have them on and there is almost no wear yet. No kidding. I live in Michigan and like to winter steelhead and I seem to have no problem in deep snow, not like my friend's F150 with Yokahamas. I don't know the cost, they were new when I got the truck. I think I'll easily surpass 60k,70k maybe even 80k. Jeff