Sealed steel bearing, waterproof and dustproof, super. Material: Aluminum alloy tooth/ceramic bearing. 1 Rear Derailleur Wheel.
1PC - 11-17T Wheel MTB Ceramic Bearing Pulley Road Bike Rear Derailleur
Light Weight MTB Ceramic Bearing Pulley Road Bike Rear Derailleur Newest
11-13T Wheel MTB Ceramic Bearing Pulley Road Bike/Bicycle Rear Derailleur
11-13T Wheel MTB Ceramic Bearing/Pulley Road/Bike Bicycle Rear Derailleur
11-17T Wheel MTB Ceramic Bearing/Pulley Road Bike/Bicycle Rear Derailleur