Now I've seen EVERYTHING
 

Streamlined valve stem caps.

Streamlined VALVE STEM CAPS.

Me too
 

It is cheaper to get the 4 caps versus the 2 caps.....hmmm

It might work on the bicycle if all the spokes were teardrop shaped in section.

7 usd. Wonder how long it will take for your return of investment.

Flattened "aero" spokes are indeed a thing. I guess I shouldn't be surprised that "aero" valve caps have made their way to cars. :D

that and a ECOMODDER bumpersticker are good for 1/100 of a mpg......:rolleyes:

How much mass are we adding to get that aero benefit?

Or one could just get some moonies and save some real MPG.

The 4pk is to fit Shraeder valves, the 2pk is to fit Presta valves.

I think I'll order 12 and put them in a row over the stubby antenna :)

I made a wing shaped sleeve for that antenna, but it took a few attempts to get it sturdy enough and even then it lasted just a year.
Also I could not distinguish its effect from my tank log.