Cooper AT3's 265/70/16 Load E
By way of intro: my baby is a '99 4Runner LTD with factory e-locker. All OEM, minus me taking the running boards off. Main driving habits: paved roads/highways as my daily drive, but I venture off road for fishing and hunting regularly (gravel fire roads, back trails, creek crossings, muddy paths, snow/ice, grassy fields). PSI stays steady at 44psi all around, but when loaded with a week's worth of gear I bump it up to 50psi in the rear and 46psi in the front.
I put Cooper AT3's in LT265/7016 on last year for my AT tires, and have been super impressed. The LT sizes come with 2-3/32 extra depth over the P-rated tires, and mine are the E-rated. For a straight forward AT tire, they have not disappointed me. This saw me taking it into terrain I would not have thought the tires would handle as well as they did. This past fall for my buddy's goat draw and my moose hunt the tires waded through doorsill deep creeks, mud pits, snow drifts, hundreds of km's of gravel roads and washboard, and sharp shot rock steep exploration roads. Not a single flat, not a single instance to engage the E-locker, or hail mary high speed runs. Some careful picking of lines and sensible throttle/brake use saw me through every place my buddy went with his '07 Tacoma TRD DoubleCab outfitted with stock size LT Duratracs. Now I run dedicated snowflake tires for the 5 months of winter we get in Northern BC, but the snow/ice/frost heave that I have crossed has been no problem. They clear mud far better than the BFG's I had on my '96 Tacoma in 31x10.5/15, and don't throw too many rocks. They also deal with standing water on the highways better than any other AT tire I've had (Nitto AT Terra Grappler, Michelin LTX MS, BFG's).
Given unlimited funds and the choice to buy new tires, I would go back to the AT3's in a flash for what I need. I am expecting to get 50-60,000km out of them, especially given the light weight of a '99 4Runner on E-rated tires. YMMV, but I was blown away at just how good these tires are, without being big knobby tires. Come to think about it, they fit the understated capability of the 4Runner perfectly.
Make sure to check out Expedition Portal's tire review for any further questions on the AT3