will tire size affect gas mileage?

Question

Does a slightly bigger tire size affect an suv's gas mileage?

Answer 1

Yes and no. It further separates the gap between city mileage and highway mileage. For a slight change, nothing will be noticable.

Since they are larger, they will require to begin acceleration. This will not even be noticable on a slightly larger size.

Here's the kicker: On the highway, the SUV will get better gas mileage, because the tires are covering more ground per rotation. This will only be noticable on long trips, and maybe not noticable at all for a slight difference.

But, this is, of course, to a certain extent. Huge tires will greatly reduce mileage.

Answer 2

Tire Size And Gas Mileage

Answer 3

This Site Might Help You.

RE:
will tire size affect gas mileage?
Does a slightly bigger tire size affect an suv's gas mileage?

Answer 4

There are two effects from putting larger circumference tires on your car.

They will usually be wider, so more friction (resistance) and weight, reducing mileage a bit.

Because of a larger circumference, they will travel further for every turn of the driveshaft, increasing mileage a bit.

I don't think you'll see much difference, if the change is small.

Answer 5

Yes bigger diameter wheels/tires will affect gas mileage. Your fuel mileage should increase. What happens when you put the bigger wheels on is you effectivley change your final gear ratio. Bigger tires lower the ratio numerically. Simply put it's like overdrive on your transmission.

Say you have 3 gears and overdrive in your car. In third gear the drive ratio coming out of the trans is 1 to 1. For every revolution of the engine the drive shaft rotates once. When you kick it into overdrive the final ratio is something like .75 to 1. For every 3/4 of a revolution of the engine the drive shaft rotates once. This saves fuel.

When you get the rear end the ratio is changed again. 3 to 1 isn't uncommon so for every 3 revolutions of the drive shaft the tire will rotate once. When you put larger tires on you lower this ratio again, so it takes less revolutions of the drive shaft to turn the wheel once. This saves fuel.

Answer 6

Yes, bigger tires will cause more drag and friction, thus causing you to burn more gas. Its not a big difference. But when i wend from a 14 inch rime with a 22 inch tire to a 15 inch rim with a 26 inch tire i noticed that i was paying about an extra $5 per tank.

Answer 7

if you talk to people w/ lift kits thats where it really hurts you. but to hop a set of 20", or 22" wheels and tires you will notice it on the pedal at take off's; and lose alittle on the highway but these guy's are right.