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Old 02-23-2013, 03:05 PM   #14 (permalink)
RedDevil
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Red Devil - '11 Honda Insight Elegance
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The width of the track may have a bigger effect than the circumference. It is a 4.5% difference.
The wider tire will have higher air resistance and less grip in rain at highway speeds (as more water needs to be squirted further aside).

Another thing; the heavier tire may well be harder to flex, so it would have a higher rolling resistance.
I'd go for the narrow tire and pump it as hard as I dare.
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