As I know you know, aerohead, cut-off dates are neither good scholarship or good science. A more nuanced and careful critical reasoning and theorizing is always necessary. And though this is not my field, it seems to me that the two studies I have been sharing here, which seem high grade, do not support a conclusion that the "Tesla wheel" is always good, that a "thick outter radius" is neccesarily superior, or that the smooth cover is necessarily inferior. We are back to the old problem, discussed here often over the 9 years I have been here: each vehicle is a different context and different procedures and testing tools can yield different results. YMMV. Be skeptical of claims. And that skepticism is also where this thread began...
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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