I'm reluctant to report my experience with that same tire because it seems at odds with all but one of the comments from other owners.
About three years ago I installed that same Dunlop tire in that same size on my 2wd truck. It came with a 60,000 mile tread wear guarantee. I do not drive off road and the front end was aligned at the same time the tires were purchased. Nonetheless, they wore out in 25,000 miles. I had no problem with the dealer pro rating the next set of tires. He did say the tire had a history of wearing out prematurely in the Northwest area of the country but not so in other areas. I have had excelllent service with the dealer so I have no reason to doubt his explanation. It just seemed a little odd. Later on he informed me they no longer stock that tire because others had that same experience.
From the comments of others I tend to think the treadware problem has since been fixed. However, for what it's worth that was my experience.
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'94 SLT 2WD, 5 Spd. , TST #6(250/635), 215 HP Injectors, 3. 54, Synthetics, By-Pass Filter, EGT & Boost Gauges, Psychotty Air, BD Exhaust Brake, Horton Fan, 4" Exhaust, Prime-Loc, Cummins Chrome Kit, Gutted Cat, Air Lifts, PIAA's, 255x85Rx16's and copious amounts of 12v Pride.