No personal experience with the Cooper Discoverer ATPs but, since you've garnered over 120 views with no replies yet, I'll give it a shot...
:REOutCampFire03:
I've seen lots of half-ton pickups getting ATPs mounted/balanced at Discount Tire locations over time. Lots of people are running those tires around here (maybe not as many as are running the ubiquitous BFG All-Terrain T/A KO), so I figure the Cooper ATPs have got to be pretty decent for people to keep coming back like that. However, I also know that Cooper released the newer Discoverer A/T3 at the same time as the S/T Maxx, and it is supposed to be an improvement over the ATP.
:safari-rig:
As an FJC owner I know one of the bigger issues with the 265/70-17 size is the lack of C or D Load Range tires. There are few choices and not all are relative bargains. It seems we are stuck with mostly Standard Load (SL) P-Metric tires or overly heavy/stiff E Load Range tires. The more highway-oriented P-Metrics generally don't suit the capabilities of our trucks while the E Loads are so heavy they unnecessarily hurt mileage, ride, and maybe even the ability to conform well when aired down on lighter-weight vehicles. For example, I know for a fact that the Nitto Trail Grappler is almost bulletproof, but it is seriously heavy and the sidewalls are so stiff that there was no significant bulge in the sidewall of a 35x12.50-17 until it was aired down to less than 15PSI on a 2-door Wrangler. There are currently C Load offerings for the BFG All-Terrain ($230ea) and Goodyear Wrangler Duratrac ($246ea), but there is also a C Load version of the newer Cooper Discoverer A/T3 for around $200ea (mount/balance not incl.).
I would also highly recommend you take a look at the Falken WildPeak AT (aka tha Falken Rocky Mountain ATS from Discount Tire). It is another of those 'in-between' tread designs that is not as aggressive as the BFG All-Terrain or Duratrac, but it is surprisingly capable off road, really
really good in wet weather, and a real bargain. A good friend of mine is very happy with them on his 80-Series. Only drawback is that they currently have only P-Metric or E Load variants available in this size. Still, for the price ($156ea for E Load) they are worth considering.
Other suggestions might include the Hankook DynaPro ATM RF10 and Nitto Terra Grappler AT. Here's the full listing of 265/70-17 Tires (including those shown above) @ Discount Tire Direct -
http://www.discounttiredirect.com/d...r=70&rd=17&counter=0&fl=&sortBy=prca&fqs=true
Good luck and bring us some pictures when you finally decide! :ylsmoke: