DJC 12 Speed Bike Ceramic Bearing Pulley Wheel Guide Roller Jockey 11T 12T 13T 14T MTB Road Bike for Shimano for Sram 12s

High-concerned chemical：None Derailleur Groupset Type：Mechanical Derailleur system Model Number：8-12s Total Capacity：8/9/10/11/12s Gears：12 Speed Material：aluminum Type：Rear Derailleur Brand Name：DJC Components Origin：Mainland China Components：Derailleurs

High-concerned chemical: None Derailleur Groupset Type: Mechanical Derailleur system Model Number: 8-12s Total Capacity: 8/9/10/11/12s Gears: 12 Speed Type: Rear Derailleur Brand Name: DJC Components Origin: Mainland China Components: Derailleurs