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I'm interested in improving the wheel aerodynamics of my Protege. I'm considering buying either the flat Insight alloys or some moon disc hubcaps.

Does anyone have any experience with Insight wheels; are they nearly as low-drag as moon discs?

One would anticipate that the Insight wheels would be much more expensive than moon discs, but junkyards are selling sets of Insight wheels for $100-150. Also, I need new tires, so regardless of what I buy, I will need tires mounted and balanced.

Has anyone ever had moon discs stolen? They'd be easier to steal than alloys.