Look at what I stumbled upon:
Ferrari F1 F2008 | Formula 1 Photo Gallery
Look closely at the wheels. Can someone say "wheel covers?" Pretty nifty the way they painted them to look like their BBS sponsor's signature wheel pattern.
Open wheel racing is burdened by the enormous amount of drag generated by those large exposed wheels.
F1 gives them a toroidal shape and slaps covers on the ends. Presumably this lowers their drag.
However, if you look closely at the picture you'll notice that the covers don't spin- as evidenced by the vents.
Anyway... I thought I'd share.