The old tires were last replaced in '04 (by the date code on the tire) and were not only dry-rotted, but worn poorly and half-bald. We wanted a tire that would handle off-road high-speed abuse and perform great on-road when towing. We settled on the Goodyear Wrangler SilentArmor, which gives us a layer of Kevlar belting to take the abuse, plenty of sipes for wet and winter traction, and two fairly large circumferential grooves for better off-road traction. The truck had up-sized 285/75R16 tires on it when we got it, so that's the tire size we put back on. It might be too tall for decent towing with the factory 3.55:1 gears, but we just couldn't bring ourselves to return to a smaller tire.