NEW Shimano Ultegra RD-R8050-GS Di2 Rear Derailleur - 11-Speed, Medium Cage, Black variant-size-45 Upper Stack Height: 18

Upper Stack Height: 18

8 mm handlebars (with included shim)

Bulldog includes free 1-year

If you want to adjust something in the build

NEW Shimano Ultegra RD-R8050-GS Di2 Rear Derailleur - 11-Speed, Medium Cage, Black variant-size-45 Upper Stack Height: 18The Shimano Ultegra R8050 11 speed rear derailleur focuses on stress free operation in order to provide all day riding comfort with braking and shifting. Rear Derailleur Mount Type: Shimano Rear Direct Mount Rear Derailleur Mount Type: 10x1 Standard Rear Der Shifter Compatibility: Shimano Road Di2 Cage Length: Medium Drivetrain Speeds: 11 Weight: 242 Color: Black keyword search: GM24855V Chain Wrap Capacity (teeth): 39 Largest Cog: 34