Go with the 35's you will not regret it. The tires make the rig. The power loss is not that noticable nor is the loss in mpg (the speedo is about 5mph off with 35's), think of what you gain not only in looks but offroad applications. That is what did it for me... I know the truck will perform to its max when offroad if its equipped with the right gear. I agree these rigs should come stock like this.
