[j-c-c]

Originally Posted by Piwoslaw

IIRC there has been discussion here of wheel rims which would "pump" air outwards, reducing pressure under the car.
The reduced pressure would have to fight the suspension springs, and the outcome of the discussion seemed to be that the increased pumping losses outweighed any benefit from potentially reduced underside aero drag and/or temporary lowering of the car (assuming the suspension gave in).

Given this outcome, these rotor/fans might lean towards the unaerodymic thread.

Anyway, these do not work well with smooth moonies, so, yeah.

Since items you noted were primarily on fronts, any ground effects were likely only an afterthought.