Called brake dust shields, branded Kleen Wheels, what's your opinion on any aero benefits? What if their vents were closed?
https://www.kleenwheels.com/componen...015/task,view/
I get that if a particular style of wheel was especially resistant to airflow crossing its surface, like maybe it sticks out real far, or was especially bad at creating turbulunce, like maybe it's shaped like a fan or is spoked, that covering it with a smooth mooncap with a perfectly radiused surface would offer substantial benefits but so long as the wheel doesn't stick out and isn't particularly convoluted, I think the airflow
through the wheel is the primary problem, with turbulence within the wheelwell secondary to that, both of which I think the brake dust shields would control and if possibly modified to block air might be even better.
Seeking educated opinions