wnelax04sr5
New member
First of all, Michelin tires are over-rated garbage. We already hashed this out in another thread. How do you think they get 90,000 miles out of a tire? By using hard rubber compound. And hard rubber compounds simply can not grip as well as soft ones. Also, all you have to do is search the web and you'll see LOTS of Michelin and BFG (same company) tires with dry rotting. Many people find they can't even use up all the tread before the tire gets too old to keep in service. Just utter junk. For the prices you pay to get Michelin, you could have MUCH higher quality USA made tires on your truck.
Second, what hurts mileage is 3 things: rolling resistance, height (leverage), and weight. You already said the weights are the same. And you already said you're sticking with the same type of tire so rolling resistance won't be a huge issue. The height will be the only thing working against you. From real world experience I'm betting you'll lose 0.5 MPGs by going up a size.
Now, if you go with aggressive tires or heavier tires, your mileage will be destroyed. I have lost a hand calculated 1.75 MPGs since going to 255/75 MTs. That's 33 bucks a month for me (1300 miles per month) and it's just not worth it. So I'm selling my new 255/75s and I'm going back to a milder tire for this particular rig.
i fully agree on all points you make about the michelins. he argued that people get more miles out of michelins, and i asked him what load range he was looking at. it was E. its a harder ride, harder compound, and is more expensive. Ive looked at the at3, toyos, bfgs, and goodyears, and for me, the firestones just make the most sense