Originally Posted by
OBoile
Running speed varies far, far less than cycling speed and thus no real need for something analogous to a PM.
The range between a casual runner's pace and a competitive one is similar to differences in cycling, if that's what you mean.
If you're talking about the higher speeds of cycling causing greater aerodynamic drag - square of speed etc - I addressed that. It is meaningful at even an 8 minute pace, and would have the same "need" in running as in cycling after that point.