The "off-road" tires are ORWL BFG Rugged Trail TA's in LT265/70R-17 (load range "E") sizes only. They're not the greatest, but as you'll see if you look, there are not a lot of tires available to fit 17" wheels in a load range "E" -rating. The "street tires" that are standard (at least on the SLT and Laramies) could be Goodyear or Michelin LT A/S's (the dealer won't guarantee which).