Originally Posted by
icemilkcoffee
True, but that is an estimate. His exact aerodynamics coefficient is not known. Nor is the wind direction, or even things like tire rolling coefficient- I don't think anyone measured that back then.
Folks were measuring rolling resistance back in the 1990s, and some even before then. But yes, these are all estimates, and people can argue upside down, backwards, and sideways over the accuracy.