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Old 08-29-2012, 10:19 AM   #20 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
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Short answer: it depends.

You can find a good discussion of aero losses vs tire width in this thread: http://ecomodder.com/forum/showthrea...g-cd-7475.html

You can also use the aero/rolling resistance calculator to estimate effects of changes to Cd/A & RRC from tire changes: http://ecomodder.com/forum/tool-aero...resistance.php
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