One thing I remember reading long ago is that inset amount of the tire/wheel matters more than anything else. Not that its my opinion but I guess some people think it looks "bad" to have it set way inward in the well. So marketing may keep this from being a viable option on a production vehicle. Makes sense to me that having it set way deep in there away from the air flow across the well would be beneficial. I don't recall where I heard this. I think it may have been a Bonneville speed guy.
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99% bev now
1% other junk
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