No.So the weight will affect the mpg & response more than the size?
Looking at mpg, this is probably true, but unsprung weight, compared to sprung weight, will wear suspension components faster. Unsprung weight has the effect of lower traction, and drive-ability if you are after performance; but, it can improve comfort in the seat of the pants.Since your tires are in contact with the ground, an additional 10 pounds in weight on one tire and wheel (40 pounds for all four), is the exact same as 40 pounds sitting in the bed of your truck.
I agree, if all we are looking at is weight and size. Rubber compound and thread pattern will have the biggest impact on mpg.SIZE and only SIZE (I.E. height and width of tire) will effect your mpg and response.
I doubt you will see much effect in gas mileage from tire size alone, but you will see a big effect in speedometer accuracy. You will need to get some kind of unit to tell the ECU the new tire height.I current have the stock (265/70/16) wheels & tires,,,I have an option to purchase 2013 18in wheels & tires..My question is how much will these effect my mpg and response?
There are a lot of aftermarket ECU programmers that will re-program the ECU. Hypertech makes power programmer (#32500), but the unit will run you ~$325. There might be less expensive ones out there.Yea, I fitted one tire on front to see if I had clearance, as I said, there was 2in diff in height.
Stchman, this was my concern is the 2in in height diff gonna confuse tranny & reduce my mpg...On my camry I put 195/75/14 over 195/70/14 and I notice a diff in both response & mpg,,mostly in response ....
You said you are currently running 265/70/16s. Do they rub any? If they do, you probably don't want to go 265/75/16s as they'll be taller and will rub more. If your current tires do not rub, have the tire shop test fit a 265/75/16 before you buy all four.I think I will stay with 16in & replace with 265/75 tires.. that way I wont have set tires/wheels to get rid of...