8T 10T 11T 12T 13T 14T 15T 16T 17T Ceramic Bearing Alloy MTB Bicycle Rear Derailleur Pulley Jockey Wheel Road Bike Guide Roller
Size: 8T 10T 11T 12T 13T 14T 15T 16T 17T
Bearing: Ceramic Bearing
Material: aluminum alloy 7075
Color: Black Red
Weight: about 7.8g
Fit for: 4/5/6 MM roller screw axis
Apply for: most of rear derailleur on the market