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Shimano Dura Ace RD-R9100 SS 2×11 Rear Derailleur


The new DURA-ACE rear derailleur features Shimano’s Shadow RD design, which gives the derailleur a lower profile and more stable operation.

Most advanced component group of all time: Shimano Dura Ace 2×11-speed Rear Derailleur RD-R9100 SS
With the introduction of DURA-ACE R9100, Shimano has reestablished the new benchmark for road performance by improving each component and incorporating its newest technologies. DURA-ACE R9100 delivers unparalleled performance, highly-refined ergonomics and immense customization to maximize every rider’s potential.

Engineered for the next generation of race bike, DURA-ACE R9100 offers top-tier performance across numerous configurations. Available with either Di2 electronic or mechanical shifting, for the first time, riders now have the option of premium DURA-ACE hydraulic disc brake performance. New Shimano technologies further integrate the DURA-ACE as a system, including a new power meter, while riders further integrate with their bike through new E-Tube wireless connectivity. Shimano’s Rider Tuned philosophy and customization of the bicycle’s function also expands with a wider range drivetrain that now includes intuitive Shimano Synchro Shift control.


  1. Stable shifting performance
  2. Pulley follow-up in certain distance
  3. SHIMANO SHADOW RD construction
  4. Low profile rear derailleur design
  5. Race endurance for less damage in crush
  6. Adapted for race specific frame design

Product features

  1. Use: Road
  2. Group: Dura Ace
  3. Model: RD-R9100-SS
  4. Cage: short
  5. Mount Type: Direct Mount
  6. Gear front: 2-speed
  7. Gear rear: 11-speed
  8. Compatible Chain: HG-EV 11-speed / HG-X 11-speed
  9. Max. teeth large sprocket: 30T
  10. Min. teeth large sprocket: 25T
  11. Max. teeth small sprocket: 14T
  12. Min. teeth small sprocket: 11T
  13. Max. Front Difference: 16T
  14. Total Capacity: 35T
  15. Material: Aluminum, CFRP
  16. Weight: 158g (manufacturer information)