Shimano Ultegra RD-R8000-GS Rear Derailleur - 11 Speed Medium Cage Black CheckoutSpec= Carbon Outer Cage }Shimano SM-JC40 Di2 External Frame

}Shimano SM-JC40 Di2 External Frame Junction Box 4-Port

Finger Style Full FingerSeason Warm WeatherTouch Screen Compatible YesGender/Age UnisexColor BlackPadding NoneSize SmallInsulation Type NoneDefined Color BlackFabric Weight Light

19mm diameter

BCD Direct Mount SRAM 8 Bolt Speed 12 BB Inclusion No Teeth 50 Connectivity ANT+ BT

Shimano Ultegra RD-R8000-GS Rear Derailleur - 11 Speed Medium Cage Black CheckoutSpec= Carbon Outer Cage }Shimano SM-JC40 Di2 External FrameShimano Ultegra RD R8000 GS Rear Derailleur 11 Speed Medium Cage Black. Shimano Ultegra RD R8000 Rear Derailleur TECH SPECS Largest Cog 34 Color Black Rear Der Shifter Compatibility Shimano Road Rear Derailleur Mount Type Shimano Rear Direct Mount Rear Derailleur Mount Type 10x1 Standard Drivetrain Speeds 11 Weight 210 Chain Wrap Capacity (teeth) 39 Cage Length Medium