Shimano Ultegra RD-R8050-GS Di2 Rear Derailleur - 11-Speed, , Black 

Specifications

• keyword search: GM24855V
• Color: Black
• Largest Cog: (Short Cage) 28 (Medium Cage) 34
• Rear Derailleur Mount Type: Shimano Rear Direct Mount , 10x1 Standard
• Chain Wrap Capacity (teeth):  (Short Cage)35 (Medium Cage) 39
• Cage Length: Medium, Short
• Rear Der/Shifter Compatibility: Shimano Road Di2
• Drivetrain Speeds: 11
• Weight: 242