As it says: 2013 DRW crewcab long bed. I had a set of Ironman A/T's 20", LT275/65R20 126/123/Q with bilstien 5100's all around, I ran empty around 60-65lbs air pressure rear & 65-70 in front (empty except the 50 gal aux fuel tank & 350lb 5th wheel hitch) The truck rode awesome, I have about 40k...