I picked up an F250 and am looking at putting 35x12.50's on it. (On 20x9 wheels) Found some km3's for a good deal, e-rated. Would these be a good tire on a full size truck? I know they wont last like an A/T but are they a softer compound geared towards off-roading more so than heavier truck use? Does anybody have expierence with them?