Bridgestone Revos are considered all-terrain tires, right?? Not trying to sound like I know everything, but the BFGoodrich All Terrains (A/T KO) are far and away the best all terrain tires for trucks and suv's on the market. I don't know how you use your 4runner, but BFG AT's are one of the only all terrain tires that meet the industry's severe winter weather requirements. If you wheel your 4runner at all, then these tires are for you. The sidewalls are tough as nails, and anyone in these forums who runs BFG tires can tell you how strong they are.