Bicycle Ceramic Bearing 13T-17T Carbon Fiber Bike Rear Derailleurs For Shimano Ultegra Dura Ace 105 R7000 R8000 Cycling Parts

Type : Rear Derailleur Gears : 11 Speed Total Capacity : 13T-17T Components : Derailleurs Material : Carbon Fibre Type1 : Bike Pulley Guide Wheel Set Type2 : Road Bike Carbon Fiber Ceramic Rear Derailleur Type3 : Bike Ceramic Rear Derailleur Bicycle ceramic bearings are a type of bearing made of ceramic materials, which have many advantages over traditional steel bearings. The main material of ceramic bearings is silicon nitride, which is harder and more corrosion-resistant than steel, with lower density and lighter weight