I know a lot of people ask these questions so I will chime in with my tire swap today.
Today I went from 265/70/17 BFgoodrich ATs C rated to 285/70/17 Bridgestone Dueler Revo 2s P rated.
Right off the bat the noise is WAY lower, the drive is 10 times smoother, and the truck keeps momentum a lot easier then the BFs, so Im guessing I will see an easy 1 or more better MPG when this tank is finished.
The power seems the exact same, nothing I didnt expect because the BFs weighted 45.75lbs and the Revos 46lbs. So the same there.
All around driving though the truck is so much smoother going back to the P rated tires it started with. Some people will say they are not tough enough, but yet they have a max weight of 2864lbs (or close to it) per tire and the BFs only have a 2650 or so. So really I should be able to carry more with these.
I did NOT have to regear, and nor will I because I dont feel the need. I have plenty power and can do whatever I did before.
I have very happy I went with the Revo and cant wait to drive it more and see how it works in other conditions. I will update when I use it more