Does that mean they have a short life? If so, I don't want that. Do you have any recommendations on something similar size wise that would last longer?
Typically, you wouldn't look at Interco if you want the tires to last especially if you drive on the pavement for any extended period of time. I have friends who rand the Radia's and they went back to Bias ply for the tougher tire. Others have tried SSR's then went with GY MTR's because they drive onroad a lot, too.
Tried and true tire is the BFG, but there are others out there too. Bridgestone Dueler MT's, Dunlop MT's, Yokohama Geolander MT, etc... They all have decent tires. Depending on how much offroad you plan on doing will dictate which one is better. Not to mention terrain.
BFG AT's and MT's are really good all around tires that will last over 40K miles. I believe they're supposed to be around 60K miles actually. They are very popular and are decent tires on the trails.
Some people have gone with the Pro-Comp AT's and MT's with the 4 for 3 deal. They are ok tires but not unless there is a deal going on. Otherwise you'd be better off with the BFG's.
The GY MTR's are a really nice tire. They are a lot thicker then most other tires except for TSL Bias and maybe BFG Krawlers. They aren't mud tires. If you can afford them, they are probably the best of both worlds tires.
Most guy's out west don't run Mickey Thompsons or Dick Cepek's. Depending on which tires you're looking at, it could be bias belted or radial. The M/T Baja Belted HP's and the Dick Cepek FC's were popular in the early 90's though.
The big name tires like TrXus, MTR, PJ, PC xtreme, BFG Krawlers, M/T BajaClaws, Maxxis Creepy Crawlers, Toyo Open Country, etc... tend to cost more.
Although if you want a street tire then you'll probably be looking at a basic SUV/truck tire. These are basically oversized car tires made to fit a small truck. They aren't very good offroad but they do well onroad. Most AT's fit into this category, Bridgestone, Dunlop, Continential, Kumho, Firestone, Goodyear, BFG, Yokohama, Parelli, etc...