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From the picture, the cfd design version has much bigger beam of the frame than the conventional one. This is probably due to the elongated elliptic shape used in the design.( I guess) The much larger exposed area of the frame will also produce much larger surface frictional drag. So the only way to check the validity of the cfd design is to test the rider and the bike together in the wind tunnel.(or on computer) Perhaps, it's more effective to condition the rider such that the rider's body shape will be turned into a elongated elliptic shape to reduce the drag based on this cfd design.(the rider's body cross-sectional area is the dominate one.)
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