Shimano Ultegra DI2 RD-R8050 Rear Derailleur 11-SPD Short Cage Double For 25-30T


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  • The Ultegra Di2 RD-R8050 11-speed rear derailleur features Shimano's Shadow RD design and incorporate these new cockpit functions. The electronic rear derailleur is compact and designed to protect the shifting operation in the event of a crash.

    Everything you need to make your ride distinctively yours: The Shimano Ultegra Di2 11-speed Rear Derailleur RD-R8050 SS
    The new Ultegra R8000 series is taking our rider-tuned philosophy to the next level, with an extensive range of components for mechanical shifting, electronic shifting (Di2) and time trial / triathlon.

    The Di2 (RD-8050) or mechanical (RD-R8000) rear derailleur (RD) adopts the Dura-Ace low-profile Shimano Shadow RD design to sit fully under the cassette, tucked away from potential damage. The RD comes in a short cage (SS) design to cover 11-25T to 11-30T and a longer cage (GS) design to cover 11-28T to 11-34T. Both front and rear Di2 derailleurs communicate with each other to operate full or semi Synchronized Shifting mode, allowing the rider to maintain concentration on the road or the race ahead.


    - Ergonomic shifting operation without stress
    - SHIMANO synchronized shift
    - Low profile rear derailleur design
    - Race endurance for less damage in crush
    - Maintains compact and smooth appearance
    - SS Version - for Cassettes up to 30 teeth


    - Use: Road
    - Group: Ultegra Di2
    - Model: RD-R8050-SS
    - Cage: short
    - Mount Type: Direct Mount
    - Gear rear: 11-speed
    - Compatible Chain: HG-EV 11-speed / HG-X 11-speed
    - Max. teeth large sprocket: 30T
    - Min. teeth large sprocket: 25T
    - Max. teeth small sprocket: 14T
    - Min. teeth small sprocket: 11T
    - Max. Front Difference: 16T
    - Total Capacity: 35T
    - Compatible: EW-SD50
    - Master unit: No
    - Firmware update by E-tube Project: Yes
    - E-tube port (pcs): 1
    - E-tube connector (pcs): 0

    Material - Aluminum, CFRP

    Weight - 242g (manufacturer information)
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