16T Bicycle BikeCeramic Bearing Jockey Pulley Wheel Set Carbon Fiber CNC Rear...16T Bicycle Bike Ceramic Bearing Jockey Pulley Wheel Set Carbon Fiber CNC Rear Derailleurs Guide Replacement for Shimano 6800/6870/4600/9000/9070 Ultegra/DURA ACE This carbon fiber bike rear derailleur will save your bike chain friction resistance. 16T...more
16T Bicycle BikeCeramic Bearing Jockey Pulley Wheel Set Carbon Fiber CNC Rear...16T Bicycle Bike Ceramic Bearing Jockey Pulley Wheel Set Carbon Fiber CNC Rear Derailleurs Guide Replacement for Shimano 6800/6870/4600/9000/9070 Ultegra/DURA ACE This carbon fiber bike rear derailleur will save your bike chain friction resistance. 16T...more