In this article I will review the C-Bear OCM Ceramic Pulley Wheels for Shimano GRX-RD-820 12-speed rear derailleur on the Canyon Grizl CF SL 8 1-by. On the Canyon Ultimate CF SLX I’m also running a pair of ceramic pulley wheels.
Pulley Wheels
CEMA Bearing Full Ceramic Pulley Wheels
This article is a short review of the CEMA Bearing Full Ceramic pulley wheels. I will try to compare these against stock Dura Ace 9000 pulley wheels, but I don’t have a friction facts laboratory setup at home. So it will be an in-depth look and feature comparison.