GRX Di2 1x11 rear mech
Shimano GRX RD-RX817 Di2 11-Speed 1x Rear Derailleur
The wired 11-speed GRX Di2 rear mech for single-ring builds, taking 11-40T and 11-42T cassettes. It's still sold new for 1x GRX Di2 bikes that need a replacement or upgrade.
11Speeds
42TMax low sprocket
31TTotal capacity
318gClaimed weight
Highlights
Why we rate it
1x electronic shifting
Di2 gives crisp, repeatable shifts across a wide single-ring cassette.
Wide range
Takes 11-40T and 11-42T cassettes for low climbing gears.
Shadow RD+ clutch
Keeps the chain tight on rough tracks and switches off for wheel changes.
Genuine replacement
Keeps existing 11-speed GRX Di2 1x bikes on the road.
Tech specs
Specification
Manufacturer specification. Details may change without notice.
Specification
- Model code
- RD-RX817
- Speeds
- 11
- Actuation
- Di2 (wired E-Tube)
- Drivetrain
- 1x
- Max low sprocket
- 42T
- Min low sprocket
- 40T
- Top sprocket
- 11T
- Total capacity
- 31T
- Clutch
- Shimano Shadow RD+ with on-off switch
- Weight
- 318g (claimed)
Ordering
Available from The Cycle Collective
Available to order through The Cycle Collective in Dorking. For availability, setup or advice, call 0203 148 6764 or email hello@thecyclecollective.cc.
Product Information
Features
Tech Specs