So moon disks and pizza pans are great and all but some people do care about brake cooling, and many people (not here) think covered wheels look weird. So I was thinking, there are aero spoke bicycle wheels, why not cars? Would the improvements be too small?
Some cars already come with "aero spokes", in that the spokes get a lot wider as they hit the edge of the wheel where the air would be moving the fastest.
Painted black, spoke fairings could look pretty good IMO. Kind of like if you took these concept wheels and made the black bits bigger:
