Close this message
Dear Customer

Please click on OUR STORE to see more about our store in the Frameworks Building.


COVID-19 Delivery & Customer Updates
Dear customer Due to the Emergency and unprecedented demand we are experiencing we find that all our resources and staff are stretched to their limits.
It is very important to us to maintain the standards of service you have been used to.
We request your understanding and we will endeavour to fulfil orders , Repairs , warranty and Replies to emails/phone calls as soon as possible.
For Revised Opening Hours Please Click HERE

Brand: Shimano

Shimano GRX RX817 Di2 11s Shadow RD+ Single Rear Derailleur

Shimano GRX RX817 Di2 11s Shadow RD+ Single Rear Derailleur
Brand: Shimano

Shimano GRX RX817 Di2 11s Shadow RD+ Single Rear Derailleur

RRP: $392.08
Save: 22%
Extended Delivery Time
External Warehouse5 Days Delivery Time

SHIMANO GRX, with its gravel specific ergonomics, optimized gearing options, rugged reliability, and quiet and stable drivetrain, sets itself apart from the rest of the component world. It isn’t a reworked set of road components. It represents a ground up look at how cyclists want to explore their world. SHIMANO GRX helps you eliminate excuses, instead urging you to try that rough sidetrack or ride that little bit longer. It offers you the option to Explore Beyond.


  • Adjustable chain stabilizer prevents chain slapping and drops
  • Switch stabilizer ON/OFF to match the terrain
  • Gravel-tuned clutch tension
  • Silent and uninterrupted rear shifting on rough terrain
  • Smooth and reliable mixed surface shifting
  • Compatible with current road DUAL CONTROL LEVER
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 42T/Min. 40T
  • Total capacity: 31T


  • Model Number: RD-RX817
  • Series: SHIMANO GRX DI2
  • Direct attachment
  • E-tube connector (pcs): 0
  • E-tube port (pcs): 1
  • Firmware update by E-TUBE Project
  • Fluoric coated link bushings: 4
  • Low sprocket Max.: 42T
  • Low sprocket Min.: 40T
  • Rear speeds: 11
  • Sealed bearing guide pulley
  • Sealed bearing tension pulley
  • Top-Normal Spring Type: SHADOW RD+
  • Top sprocket_Max.: 11T
  • Top sprocket_Min.: 11T
  • Total capacity: 31T

Manufacturer's Code: RDRX817