I drive a 2001 Ford F-250 Super Cab Diesel. It's got 290,000 miles on it now and I'm looking toward the 400,000 mile mark. I've been through all sorts of tires, expensive and cheap and good and bad. Frankly, I hate buying tires- they end up costing me $1000, more or less, and there are too many to choose from. Cooper, Kuhmo, Goodrich, Goodyear, etc. A good tire is like a good airline pilot- you never know it's there. And the converse is true, also. I drive 1000 to 2000 miles to hunt, and, then, I'm on muddy two-tracks for two weeks in all parts of the country. I do that four times a year- from September to February. Poor tires can really mess me up in mud, rain, snow and combination of the above. This time I went with the Goodyear Wrangler SilentArmor Pro-Grade E. For what I paid for them, they warrant 50,000 miles. I sure hope so. You'll read about it if they don't.