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Old 09-20-2019, 08:41 PM   #5 (permalink)
mpg_numbers_guy
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Toby - '13 Toyota Prius C
90 day: 61.95 mpg (US)

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Quote:
Originally Posted by buschman View Post
With that said I won't go smaller than the 245mm width I currently have. If I get the wider rims(9.5") I'll eventually move up to a 255mm or 265mm tread width. I'm really just trying to gauge how costly the wider tread will be to my MPGs.
Anything wider will hurt your mpgs, but since your stock tires are already wide and grippier than a typical low rolling resistance tire, you likely won't see much loss from going wider. Probably in the neighborhood of 1-2 mpg, like Daschicken said. Likely not enough of a difference that you would notice it when filling up unless you monitor your fuel economy closely.
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2013 Toyota Prius C 2 (my car)


2015 Mazda 3 iTouring Hatchback w/ Tech Package (wife's car)
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