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Old 07-11-2012, 11:44 AM   #59 (permalink)
ERTW
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Join Date: Jan 2012
Location: Toronto
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Bu - '08 Chevrolet Malibu LS
90 day: 32.29 mpg (US)
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The top half of the tire is spinning against airflow - this is what we don't want. The bottom half of the tire is spinning with airflow - so there's little to no gain. Hth
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