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Old 06-10-2008, 11:04 PM   #2 (permalink)
guitarterry
EcoModding Lurker
 
Join Date: Apr 2008
Location: Kampsville
Posts: 77

stinky - '97 geo metro lsi
90 day: 44.71 mpg (US)
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wow, what a question. No change in diameter, but a heavy aero tire, to a light fat tire. i would say, city use the light tire, highway the aero tire. In my opinion, (no facts) the difference between the two would not be worth it unless you go bigger diameter.
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