Cd or Coefficient of drag represents the “Slipperiness” of the Bike and Rider and is a dimensionless number that relates an objects drag force to its area and speed, it ranges upwards from 0. (An object with a drag coefficient of 0 does not exist on earth).
Teardrops or wing shapes have some of the lowest drag coefficients.
Typical drag coefficients are as follows:
|Wing or Teardrop||0.005|
|Person stood upright||1.0|
|Flat plate face-on to airflow||1.17|
|Cyclist (Aero Bars)||0.70|