[JulianEdgar]

Originally Posted by California98Civic

Right, but it is a quite modest improvement from the solid cover and without a wind tunnel for testing, guys could be forgiven if they went with the rule of thumb and used a solid cover. I think a nuance is getting lost here. The smooth wheel covers are still REALLY GOOD compared to baseline. Although COCyclist may have found a design that seems by his (necessarily imprecise) testing to work better than a smooth disc, it seems highly unlikely to me that smooth discs are infact worse than baseline.

For what it is worth, COCyclist's rims are a little like the "thick radius" rims, but they are not the same. The openings are larger and longer, extending further out from the center. A maxim to remember: each car is different, YMMV, and be skeptical of how any test applies to your vehicle.



In my case I made rims I knew would not conform to the smooth cover standard, but I liked them better because they are lighter and don't scream HYPERMILER. If COCyclist is digging the OEM look and feels confident they give him good results, I don't think it is "heresy" (or a "myth" "busted")

If you want a rule of thumb, better in fact not to go for complete covers. Saying otherwise simply goes against the evidence. And that does in fact seem to me to be a myth busted.