I had terrible luck with K02s. I posted about it before, cliff notes: terrible tread life, uneven wear, sagging sidewalls, bad ride, etc. Got warranty replacements from discount tire and they fixed me up with Duratracs.
ymmv - this was on an F350, maybe I'd have better luck on a lighter rig.
Duratracs have been awesome on 2 Land Cruisers, 1 Isuzu Trooper, 1 Chevy 2500 and 1 F350. It's all I'll buy for an offroad leaning all-terrain tire.