$SINT 3 of 3: Although they aren’t SINT bearings, I think a strong case can be made that they should be as SINT are American made & manufactured. I emailed SINT all this info & will post their response. Maybe they weren’t even aware Tesla used silicone nitride (as I wasn’t either). Hopefully they reach out and sell themselves to Tesla & inform them of all the aerospace certifications & others they have, and of course being a better choice as they are American made