I got some new Cooper Discoverer AT3 in the 265/70R18 size on my 2008 Tundra with the ATC Cougar in the bed. These are Load E rated and are very heavy duty, and just a tad taller than what is called for on the door jamb (it was as close as I could get). Very good in snow and ice on mountain passes, and added a lot of stability around town and on curvy roads. Less bouncy too. When you are pushing the limits of payload this kind of tire really makes a difference. I think my city driving gas mileage took a little hit, but highway seems the same as the old Geolanders.