2pcs 12T 14T Bike Ceramic Bearing Rear Derailleur Pulley Guide Roller Idler For SHIMANO SRAM GX Jockey Wheel Bicycle Parts

12T 14T Positive and Negative Tooth Machined Bicycle Ceramic Wheel Pulley Bicycle Rear Derailleur Pulley Set Wheel Jockey Ceramic bearing Jockey Wheels

Specification:12T,14T

Weight: approx 14g(12T), 14.9g(14T)

Diameter: approx 50mm(12T),58mm(14T),

Material ：AL7075-T6 machinedInstallation dimension：6MM/5MM/4MMBearing :ceramic bearingShell: Stainle Steel , Resistant

Color: bla,red ,blue ,green,Gold

Bushing: Copper

Feature:

it is machined by AL 7075-T6 round rod ,finished machined by diamond ,with diamond metal texture and good abrasion resistance index , it adopts ed 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 .

Package:

Narrow-Wide teeth guide pully *2 pcs

Copper Bushing *2pcs

1>:Stainle Steel Shell ,more durable , compared with nylon shell ,  nylon shell is easy to break after 100 miles travel

2>:Narrow Wide Teeth Design, Prevent the horizontal swing of the chain

3>:Copper Bushing ,High Hardne ,Improve Life Time

High strength, impact resistance

self-lubricating

good wear resistance

High temperature resistance