OP Parameters:
1. Bicycles (Not Frames)
2. Low-end to High-end
3. Made in USA
=8-)
Short answer, none. Long answer, a few (cruisers and mtbs) - but using mostly foreign sourced hubs, bottom brackets, bars, stems, cranks, rims, tires, etc. And their low-end models ain't exactly cheap.
=8-)
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5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life