The Toyo 275/65/20 are Light Truck tires (LT275/65R20 126S E/10 (34X11.0R20)) - make no mistake about it. The "E/10" rating makes them amongst Toyo's heaviest duty LT tires. This heavy duty construction makes them heavier, with deeper tread and 10-plies total. They are also 34" instead of the stock GY 33".
That said, I have them on my '09CC. But I bought them specifically to stand up to significant off-road trail usage. Being taller, heavier, luggier, and stiffer, they do effect ride and MPG - rides a bit more like a TRUCK and lost 1-2MPG.
But I won't go back...

 

The Toyo's are amazing tires. I had the Open Country A/T on my Dakota, and will be putting them on my new Ram QC. The ride quality and traction was far superior to anything else i have had on a truck. It's a shame they only had 12k miles on them when i got rid of the truck for the new Ram. I had them on my 04 Dakota as well, and had 45k on them before selling the truck.

 

alright. you guys made my mind up. ill be going with the toyo's. even though they are both not owned by a u.s. company. at least toyo has a huge stake in building u.s. manufacturing plants, etc. which is always a plus...