Stone 12s Pulley Wheel Guide Roller Jockey 10t 12t 14t 16t Bearing Road MTB Bike Rear Derailleur GX XX1 for Shimano Aero Solid

High-concerned chemical：None Model Number：stone hollow/no hollow/ aero solid style Total Capacity：10/12/14/16t Gears：12 Speed Material：POM high strength resin Type：Rear Derailleur Brand Name：DJC Components Origin：Mainland China Components：Derailleurs

High-concerned chemical: None Model Number: stone hollow/no hollow/ aero solid style Total Capacity: 10/12/14/16t Gears: 12 Speed Material: POM high strength resin Type: Rear Derailleur Brand Name: DJC Components Origin: Mainland China Components: Derailleurs