Got another reply from the (shy) asker of the original question:
Quote:
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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?
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True.
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.