Moon Wheel Covers

[Natalya]

I've finally started seeing these on Class 8 trucks here in the USA. That crowd has always been ahead of the curve with aero since the oil price spike after Hurricane Katrina.

[Fingie]

in the truck world, even a small improvement per 1000 miles is noticeable money.

Especially, if you own the truck you drive

[aerohead]

Originally Posted by FlawedLegacy

I just got a 2017 Kia Niro FE and not a fan of the stock wheel covers and was wondering if the "moon" wheel covers would help areo. I'm assuming so, and leads to main reason for the post... Anyone know a good place to get moon wheel covers? 16" wheels on my car and have found several online, including eBay for $80 shipped for a set, but I'm guessing you all will be more help than I've found via Google (which isn't much).
Thanks in advance!!

Goro Tamai reported that on solar race cars:
*a tri-spoke wheel had Cd 0.038
*a flat disc wheel had Cd 0.364
*a convex full disc was Cd 0.361