I'm looking to purchase some new shoes for the truck. Currently sitting on the stock 245/75/16 dunlops. I have the 4.0 auto 2013 and have been pleased with my fuel mileage, about 20mpg, give or take 1 depending on the type of driving. The dunlops only weigh 32 lbs it looks like ( hence the good mileage) where as the toyo open country atIIs I'm looking at weigh 40 lbs for 265/70/16 and 41 lbs for 265/75/16. I understand I will lose some fuel economy but would like the extra height of the 265/75/16 if the difference between the two tires I'm looking at is not significant. Anyone with experience switching from 70s to 75s notice a significant change with the additional inch of diameter?