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Old 10-08-2008, 09:15 PM   #10 (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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Quote:
Originally Posted by 93Cobra#2771 View Post
cfg83 - you did go for a wider tire. A 195/65/15 is 10 mm wider than the stock 185/65/15 and slightly taller as you found.

What have you found in your mileage comparisons so far?

I'm wondering if the decreased deflection/ heat generation will cancel out any loss from the slightly wider tire? 10mm is less than 1/2" from sidewall to sidewall.
I actually made the exact same tire-size switch, and my new tires aren't exactly long-life or LRR tires, but my MPG has improved (however, I think it's mostly a function of my driving). At worst, the slightly wider tires aren't hurting to any extent that I can detect.

I also get a warm, fuzzy feeling from multiplying my calculated mpg by 1.02. It's like a bonus!
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