Originally Posted by
StephenH
From what I've read, a great deal of the drag on the streamline bikes like that is at the interface of the wheels and the shell, but that would be exactly the kind of situation that was very difficult to model with CFD software. So to get a general idea of the drag on the bike is probably not too hard, but actually optimizing the details to squeeze the last few mph out of the thing is a different situation altogether.
Yep. The wheel openings account for about 1/2 the drag of the whole bike, according to Sam (watch from about 2:10 to 2:40):
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Jeff Wills
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