Road riding experiments were conducted to study the aerodynamic drag reduction with different jerseys on a cyclist. CDA was reduced with a power-based calculation method based on the quantities measured including the cyclist's power output, the riding speed and the wind speed and direction. The results show a trend that as the riding ground speed increased, the influence of the crosswind effect is decreased. The CDA values reduced from a self-made crank-type power meter were slightly higher than the values measured by a commercial pedal-type power meter. Nevertheless, the results reduced from the two power meters consistently indicate that the CDA values of the two jerseys tested were differed by 10%. This study confirms that using the power-based calculation method with the instrument installed is capable of resolving the differences in the CDA values for different jerseys on a cyclist.
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