For all who are wondering. .... today I placed an order for 4 cooper Discoverer AT3 in the 255/75r17 variety. I went with this size because it shouldn't rub and should maintain my fuel milage. ...
Now after doing some research i chose to not get an LT..... (flaming can start now) because my owners manual only suggests that your tires exceed half of the weight rating for the axles.
My 4runner is rated for like 3600 lbs for the rear and the AT3 is rated @ 2649.... this is well over half
Oh yea...my current tires are p rated also and have given me no problems for the 30,000 miles I have put on them.
Let us know how you get on with them. I had the stock p rated goodyears fail on me numerous times, so its always LT tires for me.