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junglee
09-06-2002, 12:50 PM
Is there a significant decrease in fuel economy when going to a larger tire size?
What do people think of Dunlop 8080E's?

The HACK
09-06-2002, 01:03 PM
Originally posted by junglee
Is there a significant decrease in fuel economy when going to a larger tire size?
What do people think of Dunlop 8080E's?

Yes.

bren
09-06-2002, 01:07 PM
Originally posted by junglee
Is there a significant decrease in fuel economy when going to a larger tire size?


I can't imagine you could increase the size of your tires enough to *significantly* decrease fuel economy.

I had a Jeep with 35's (stock size is 29") and only noticed a slight difference....not that a Jeep gets very good gas mileage to begin with.

Kaz
09-06-2002, 03:11 PM
No

The HACK
09-06-2002, 03:44 PM
Maybe.

Depends on a few factors...If you're going with larger rim/tire set that SIGNIFICANTLY increase the weight of the tire, you WILL suffer significant drop in fuel economy, especially if you drive a lot on surface streets.

But larger tires along will not impact fuel economy at all if there's no associated increase in weight. Remember, 1 lbs of unsprung weight = 4 lbs of additional sprung weight. So if the larger tires carry a 5 lbs disavantage that's like carrying a 80lbs sack of sh*t in your car at all times.

fuz
09-06-2002, 05:30 PM
Rolling reistance too. Like the difference between mountain bike tires and road bike tires.