[Daox]

Originally Posted by rob.e

I found this paper some time back on the aero / drag reduction of various wheel designs:

https://research.chalmers.se/publica...2_Fulltext.pdf



Looks like the basic flat cover isn't necessarily the best option.

The "thick outer radius cover" performs the best according to this research - probably why ABT use this sort of design on their formula e car and RS4: i posted about that wheel here but no one responded

https://ecomodder.com/forum/showthre...hts-37743.html

I'm thinking of trying out something like this on mine.

I think you're reading the wrong chart. Figure 10 is about ventilation resistance. You want to look at figure 12 - "Percentage difference in aerodynamic drag for different configurations". This shows a full cover is the best. Though, there are a couple that are close behind it.