Shimano GRX RD-RX817 11-Speed Long Cage Di2 Gravel Rear Derailleur Black

Product Description
The Shimano GRX RD-RX817 rear derailleur is a premium 11-speed Di2 gravel derailleur built for smooth, reliable shifting across mixed surfaces. Designed specifically for 1x GRX drivetrains, it uses Shimano’s electronic Di2 platform and a gravel-tuned clutch to improve chain stability and shifting confidence on rough terrain.

With long cage capacity and support for cassettes up to 42T, it is a strong replacement or upgrade option for compatible gravel and all-road builds using Shimano road Di2 controls.

Key Features

• Genuine Shimano GRX RD-RX817 rear derailleur
• Designed for 11-speed Di2 drivetrains
• Built for 1x GRX setups
• Long cage design
• Integrated clutch for improved chain stability
• Gravel-tuned clutch tension for mixed-surface riding
• Smooth, precise electronic shifting
• Black finish

Specifications

• Brand: Shimano
• Series: GRX
• Model: RD-RX817
• Product Type: Rear Derailleur
• Drivetrain Speeds: 11
• Cage Length: Long
• Largest Cog: 42T
• Chain Wrap Capacity: 31T
• Rear Derailleur Mount Type: Shimano Rear Direct Mount
• Rear Derailleur / Shifter Compatibility: Shimano Road Di2
• Color: Black
• Weight: 318g
• Manufacturer Part Number: IRDRX817

Compatibility
Compatible with:

• Shimano 11-speed Road Di2 shifter systems
• Shimano GRX 1x drivetrain setups
• Cassettes with up to a 42T largest cog, within drivetrain capacity limits
• Frames using Shimano rear direct mount derailleur interface

Please confirm drivetrain setup, cassette range, and derailleur mount compatibility before purchase.

Included

• Shimano GRX RD-RX817 rear derailleur

Warranty and Notes

• Designed specifically for 1x Shimano GRX Di2 applications
• Clutch tension is tuned for gravel and mixed-surface riding
• Includes only what is shown or described

Condition

• New
• Genuine OEM product
• Includes only what is shown or described