Quote:
Originally Posted by buschman
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.
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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.