Yes I am surprised as well. So much so that I also wonder if the wheel choice makes a difference. Not only in weight but in quality. I have the BBS Forged and BBS is supposed to be outstanding wheel manufacturer and I wonder if the balance or something on them doesn't help MPG's. I do not know. The tires are 34.8" to be exact. Toyo Open Country A/T III 285/75/18.Descent MPG numbers even with the roof rack, are those 33 or 34 and what brand?
It is only my guess - but I also have to think that tire width comes into play more than is discussed in relation to MPG's. I specifically sought out narrower tires in the 35" range. These Toyos are 11.3" wide, which is fairly narrow for its diameter.
Also I don't think anyone has mentioned and you probably already know. for every inch of increased tire diameter, you get 1/2 " of lift. With a lift/suspension - every inch lifts an inch. Kind of common sense but I didn't exactly think of it immediately when I started the thought process of this.







