rear der was chirping away after a new install. Brand new Record der, too. The pulleys are the sleeve/bushing type. I even took apart and tried some chain lube, still noisy. Took apart again, tried some good synthetic bearing grease, still chirping away when I pedal. There is not abnormal play or movement, they seem perfectly fine. And yes, it is the der pulleys. So, I said to heck with it and ran it on the trainer. I did notice, it seemed to get a little quieter after just running it on my trainer for a half hour. Maybe I should just run it, and see. Has anyone had this happen?
Any ideas on how to stop this?