Shimano Ultegra Di2 Rear Derailleur (RD-R8050-SS)

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Ultegra Di2 shadow rear derailleur (11-speed)

  • Sleek integrated appearance
  • New low-profile design
  • Shimano shadow rd Race endurance
  • Optimized slant angle
  • Wide compatibility
  • RD-SS covers: 11-25T to 11-30T
  • RD-GS covers: 11-28T to 11-34T
  • Maintain race concentration with more intuitive shift control
  • System communication with front derailleur
  • Shimano synchronized shift


  • Model Number: RD-R8050
  • Series: ULTEGRA
  • Maximum Sprocket: 30T
  • Minimum Sprocket: 11T
  • Maximum Front Difference: 16T
  • Average Weight: 242 g (SS type), 249 g (GS type)