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Old 12-14-2007, 05:00 PM   #3 (permalink)
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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
90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 67.41 mpg (US)
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Got another reply from the (shy) asker of the original question:

Isn't there a 12 inch rim for the metro??? I think when it first came out, the Metro had 12 inch rims. They should be lighter than 13 inch rims, right?

But going to a 12 inch rim would mean using a smaller diameter tire as well. And that would effectively reduce my gearing (making the engine spin faster at a given road speed). I expect that would reduce my fuel economy more than any savings I'd gain from the lighter rim/tire combo.

Also, my car has quite good low rolling resistance tires. If I could find a set of lighter rims that would fit, I'd want to keep using these tires.
Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
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