I have the 5 speed, 4.1 and 265/75/16.

It does not seem like a giant difference that the stock tires are 265/70/16 but I looked at a bunch of stock tire sizes and gears for toyota trucks and concluded that they probably would have used different gear set had they installed the 75s at the factory.

I'm going back to the 70 when I change tires. (I want to have a spare)