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Brand: Shimano

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

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

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

RRP: $362.82
Save: 21%
Out of StockSend Stock Request

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
  • Total capacity: 38T
  • Smooth and reliable mixed surface shifting
  • Compatible with current road DUAL CONTROL LEVER
  • Maximum front difference: 17T
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 34T/Min. 30T


  • Model Number: RD-RX815
  • 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.: 34T
  • Low sprocket Min.: 30T
  • Max front difference: 17T
  • 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: 38T

Manufacturer's Code: RDRX815