Road Bike Bearing MTB Ceramic Bearing Ceramic Pulley Rear Derailleur Rear Derailleur Pulley

Label:Yes Product Name:Wheel Bicycle Rear Derailleur Pulley Size:12T,14T Diameter:50mm(12T),55mm (14T) Package:Narrow-Wide teeth Rear Derailleur pully *1 pcs,Copper Adapter * 2 pcs(4mm,5mm) Net Weight: approx 14.9g Color: red black blue gold Green Material: 7075 aluminum Zinc Zinc Zinc Zinc Alloy

Feature: it is cnc machined by AL 7075-T6 round rod ,finished machined by cutter,with metal texture and good abrasion resistance index , it adopts imported Japanese steel bearing,rotating without resistance ,it greatly decreased frictional resistance,and increased cycling efficiency, the design inreased bike derailleur shifting speed ,it causes no noice when shifting speed k and prevent bike chain falling . Adapt to the bike speed: 7/8/9/10/11/12 speed Acrew axis:Fit for 4/5/6 MM roller screw axis Bearing:ceramic bearing ,stainless steel shell , more durable Copper Bushing , Resistant Apply for most of rear derailleur on the market