I just always liked BFG's and the new KO2 had me sold so they are on everything I own. The size is perfect for the Runner stock or slightly lifted. They deff were noticeable in power loss low end and highway takes more to keep moving but. Just use a little more throttle and let her eat it. We know the motor won't mind in long run can't hurt it. I still am impressed how well it did towing over 3K lbs in a trailer even my old diesel truck hated to tow due to wind. Towed uphillish for 3 hours in 4th gear at 60-70 mph in constant head winds. Amazed how stable and on highway empty its stable because of the E load tire. Complete overkill for this weight of truck but im happy with them. Wish they made a C load option like the 265's. And wish my ego would let me just run the 265 C load but I can't see it looking as good as the 275 which is all mental because 10mm of tire size from 25feet away can't be that noticable. I'll run mine all I can they make me happy.
Trip to FL through mountains of North Carolina I did about 70-75 mph and could get constant 18 mpg hand calculated. Best was with non ethanol fuels in south flat roads I got 19.2 mpg exact. was pretty damn happy with that. Stock tires would do much better but bahhhhh thats ugly. My 11 mile commute one way I get 16 appox stop and go lights little back roads but hilly. Anywhere from 270 miles until fuel light is on to getting 330 miles on highway range.