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Old 05-16-2008, 11:43 AM   #11 (permalink)
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I am inclined to believe it's not just the flatness of the mooncaps, but the fact that they are isolating both sides of the wheel. I think that if you simply plug the holes in regular steelies you might get something.

Something interesting to note is that most of the flow hit the wheel on the inside as the flow under the vehicle is pushed diagonally to the sides. Who knows, maybe the mooncaps are actually on the wrong side of the wheel.

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Old 05-16-2008, 01:54 PM   #12 (permalink)
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Here they are they are 16" x 6-1/2
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Old 05-16-2008, 03:55 PM   #13 (permalink)
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rim aerodynamics

The partially dished wheel cover as created by MOON Equipment is accepted as the premier low drag wheel cover.The efficacy of such full wheel discs have been recognized since Lindberg's historic Atlantic flight in the famed Spirit of St.Louis,Ryan Flyer.I'll be posting data on them in an up-coming installment,however I can state with a high degree of confidence that they fair better than anything else ever tested.Every Land speed record car,and every economy champ use them.A single perforation,used for the valve stem,and for brake cooling,as used in the Renault Vesta II is a rational application for the work-a-day world.

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