I would venture to guess you wouldnt lose that much in mileage. I would say maybe a 1mpg loss during city driving. I have 20's on bigass tires (275/55) and the mileage seems just like stock. I know 24's are heavier than my wheels and all, but I dont see how the little bit of weight difference is going to kill your mileage that much. I think youd only lose that much if you are getting a lift w/ big tires. I'd worry about the brakes more than mileage!!3-4 mpg? Wow, that is a lot more then I was thinking.
I know, but I've never had a blower hurt my mileage if I drive like a sane man.i get 14 mpg on stockers.... i must have a heavy foot..... and i drive close to 3000 a month
"2007 GMC 1500 Sierra Classic Denali. K&N, Diablo Predator, much more to come after I rob a bank!!! Like, 24's, rollpan, drop kit, umm-BLOWER???!!!"
blower and 24's and your worried about mpg