These are the same set of tires I had installed when I bought and built up my Jeep with the American Expedition Vehicles Dual Sport 2.5 inch XT Suspension Lift.
Specs are LT315 / 70 R17
This gives you a 35" tire on the 17" Method Race Wheels rim.
These tires are supposed to go about 40,000 miles and because they are wearing so well, will probably continue to provide good performance beyond that point. I am rotating these tires every 6,000 miles and that includes doing a five tire rotation (putting the spare into the mix). As all tire shops will say, they recommend tire rotations and I support that as well, including the fifth tire.