What kind of treadlife should be expected out of the current popular mud-terrain tires? My BFG all-terrains are almost down to the wear bars at 51,000 miles and I am considering getting mud-terrain tires for my next set. How do the current mud-terrains from popular manufacturers like Dunlop, Interco, BFG, and Goodyear compare for noise and treadwear? I want more offroad performance but I can not afford to buy a new set of tires every 20,000 miles.