Quote:
Originally Posted by Andyinchville1
Do you think the tire weight made the fuel economy hit that big or possibly other factors?
I've often wondered if a slightly larger diameter for highway use would change the effective gearing enough to offset any extra weight to net more mpg's...
what do you think?
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The new tires are wider, heavier, with a more aggressive tread pattern, and heavier. All are bad for mileage.
The slightly larger diameter may help at highway speeds but my car spends most of the time in the city and there I think the higher gearing is a negative.
However, the trend has been the same for me regardless of the vehicle. Better tires = lower mileage. Which is fine for me, the mileage difference is trivial and improved traction is more important to me. (The difference between 50 mpg and 45 mpg over a year is 22 gallons and $55)