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Old 07-17-2008, 09:24 PM   #1 (permalink)
whokilledthejams
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Join Date: May 2008
Location: Fredonia, NY
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Boxy Brown - '04 Scion xB
90 day: 35.48 mpg (US)
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Correcting for tire size

Despite a bunch of searching, I can't find a clear answer--

How do you correct for non-stock-sized tires? My xB came with 185/60/15's, and I have 195/60/15s. This is mostly because the only tires that I could find in 185s were garbage Walmart tires, which my car came with. The tires I've had since the beginning of June have a circumfrence 2% greater than stock. Is this even worth correcting for?

If so, how do I do it? Multiply my miles as shown on the odo by 1.02?

Needless to say, avoiding math was why I went to school for biology. I think in researching this, I've confused myself further.

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