thirstyram
Registered User
Anyone have any personal experiance trying out different tire sizes and thier effect on fuel mileage? When I got my truck, it had 285/75's and I clocked my mileage at 24.5 combined city and hwy. Only checked it once before changing tires, (BAD tire pull)so it could have been a farce. Anyway I went to 265/75's and the mileage went waaaay down. I've got an Auto and I think it has 342 gears. Somewhere around there anyway. I'm thinking of trying some used 285's just to check it but I thought I'd check with you guys first. Any free advice on tire size?