Had the original michelins, 65k
Got some lovely Pro Comp Mud Terrains, on spare rims D rated, bald at 22k.
Pirelli scorpians, E rated, about 25k so far, they were fine, when I bought the 35 ft travel trailer in florida, I pulled it all the way back on them. I don't thing they will last as long as the Michelins did, they are between 50-60% tread gone. I put them on to haul long or heavy. Although I have two 1500 mile trips on the H2/BFG combo with my 18ft car hauler and a power wagon on top.
315 70 R17 BFG all terrains on alcoha H2 rims, 5k.