1 x Rear Derailleur Pulley. Si3N4 ceramic bearings Design,When rotating, the centrifugal effect of the outer ring can be reduced by 40%, and the service life is greatly extended. Material: Aluminum alloy + ceramic.
Ceramic Bearing Bearing Guide Wheel MTB Road Bike 12/14T J 4/5/6mm CNC
Ceramic Bearing Bearing Guide Wheel 12/14T J 4/5/6mm CNC Pulley Rear Derailleur
Pro Ceramic Bearing Bearing Guide Wheel 12/14T J Aluminum Alloy + Ceramic
Hominas Bikes Pulley Guide Wheel Aluminum 14T Bikes Rear Derailleur Pulley Ceramic Bearing Bikes Ceramic Wheel for 7?12 Speed Derailleur (Dazzle Color)
2X 11Tooth MTB RS Bearing Jockey Wheel Pulley Bicycle Bike Rear Derailleur Black
11T ceramic bearing jockey wheel pulley bicycle road bike rear derailleur DS
