Experience the pinnacle of shifting performance with the Shimano Dura-Ace Ultegra Di2 6870SS Rear Derailleur. This electronic shifting system delivers incredibly fast, precise, and effortless gear changes. Designed for top-level competition, it offers unmatched reliability and smooth shifting action.

• Details
  • 11 Speed
  • 257g
  • 1 SD50 Port
  • 33T Capacity
  • Conventional Mount