I can't speak on their longevity, but my 39.5 Iroks ride better unballanced than my last 2 sets of tires (38" SSR's and 35" BFG Mud Ta KM's) Both other sets had been road force balanced on what was supposed to be Hunters latest and greatest. I am very impressed w/ the road manners of a biased ply tire, my first. Oh yeah, my truck never sits more than a day, but I am yet to experience the "flat spot" that everyone says is a draw back to biased ply. I would have to think that the radial Irok should be built equally as well. $.02