Originally Posted by
asgelle
There's a difference between conceiving of a mechanism and data*.
*If you run some numbers, you'd see A) the speed and size of a Nascar racer is so far removed from a bicycle to make it irrelevant. B) Pressure drag is such a small component of total drag that changing the pressure behind the rider could not create an observable change in drag.
No, I haven't seen anything cycling specific, only what gsa103 talked of. And I completely agree that if there is an effect it is most likely insignificant and/or immeasurable.
But hey, this is the 41 so it matters.