That time a customer's squeaky chain taught me how to spot fake ceramic bearings
I was working on a guy's road bike at the shop in Portland last month, and his drivetrain sounded like a haunted house. I kept checking the chain and cassette, but the noise was coming from the hub. Turns out he'd bought some cheap "ceramic" bearings off Amazon, and they were basically plastic with glitter. Now I always ask folks where they got their bearings before diving into a full tune-up. Has anyone else run into these fake ceramic bearings causing weird issues?