Whew! Boy did I wear this one out in several posts a while back! Try looking at this post to see if you can glean the info you are looking for:

http://64.4.43.250/cgi-bin/linkrd?_...ire%2ecom%2fcgi%2dbin%2fultimatebb%2ecgi

I actually ended up with 265 Bridgestone Revos (32s) and my gas mileage dropped about 1 to 2 mpg, but... I was running 265 Michelin LT ATXs (it originally came with 260s) and they are considered to have a lower rolling resistance, so I was probably getting better mpg than I would have with another brand anyway. In a nut shell, with bigger tires you are going to lose some power and gas mileage. There's no getting around that, it just goes with the territory. If you don't mind the extra expense in order to have a cooler looking and better performing ride (off road), then I say go for it. If you're like me, though, you will regret it. I really like the way my truck looks now, but I'm rarely able to go off road these days and for on road driving it is a disadvantage. I like the way it rides, but it handles a little slower, turns less sharply, accelerates a little more slowly, and of course, the gas mileage stinks. It wasn't great to begin with, but now it makes my commuting more expensive and the way they are talking on the news about escalating gas prices, it's just going to get even more expensive. <img src="/forums/images/graemlins/frown.gif" alt="" /> It does look cool, though! <img src="/forums/images/graemlins/coolg.gif" alt="" />