If I order 2 spares at a time I think 200,000 miles warrants some new parts. One bearing was ok, the other was not, spun heavily and bounced a bit. Another thing I noticed about the failed bearing was that the open bearings didn't have lubrication like a good bearing. And judging purely by cosmetics, they are clearly different factories. I ordered 3 while waiting for the return instructions and everything was fine. So I hope that the seller understands that he has a bad supplier.