We run Dura-Tracs all year on our trucks. Great Winter tires. I have friends that run a 2nd set that is studded for winter. Been running these tires for at least 5 years now. I am on my second set as of this May on my 2500HD CC 4x4. First set got 97K, (3 years old) could of easily got 10-15K more, just started to get into busy season, pulling trailers (work and play) and I wanted to be safe with the amount of gravel driving coming up. My guess is there is about 25% tread left on the first set...
IMO, best overall tire for pickups.
I run 285x70x17's, some of our trucks have 265x75x16's some 245x18".
DuraTracs come in 20", just pricey...somewhere about $500 rings a bell.