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Shimano Ultegra 11-Speed Di2 Rear Derailleur
  • Model: Short Cage
  • Model: Mid Cage


Ultegra 11-Speed Di2 Rear Derailleur

Model # (RD-6870)
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Shimano Ultegra 11-Speed Di2 Rear Derailleur

Shimano's electric-shifting 11-speed Ultegra Di2 Rear Derailleur is driven by battery power and a servo motor, so shifts are fast, precise, and perfect every time. It's made of light, tough cold-forged aluminum while mid-cage and short-cage models give you your choice of cassette. Since there aren't any cables or housing to stretch or fail, maintenance is dramatically reduced and shifting accuracy is unprecedented. This high-tech derailleur is even designed to move inward under impact to reduce the potential for damage in a crash.

Features and Information

  • Chain-wrap capacity: 33 teeth
  • Largest cog: 28/32 tooth (short cage/mid cage)
  • 250/260 grams (short cage/mid cage)
  • For use with Shimano Di2 road drivetrains


by PowerReviews
Option Barcode Manufacturer's Part Number
Short Cage 00689228930544 IRD6870SS
Mid Cage 00689228930551 IRD6870GS

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