GRX Di2 2x11 rear mech
Shimano GRX RD-RX815 Di2 11-Speed Rear Derailleur
The wired 11-speed GRX Di2 rear mech for 2x gravel bikes, still available new for servicing and upgrading earlier GRX Di2 builds. It takes 11-30T to 11-34T cassettes and adds a switchable Shadow RD+ clutch.
Highlights
Why we rate it
Electronic precision
Di2 gives consistent, accurate shifts that don't drift with cable stretch or grime.
Synchro Shift capable
Works with 11-speed GRX Di2 front mechs for synchronised shifting.
Stable chain
Shadow RD+ damps chain slap on rough ground and switches off for smooth roads.
Keeps 11-speed Di2 going
A genuine replacement for crash-damaged or worn 11-speed GRX Di2 mechs.
Tech specs
Specification
Manufacturer specification. Details may change without notice.
Specification
- Model code
- RD-RX815
- Speeds
- 11
- Actuation
- Di2 (wired E-Tube)
- Drivetrain
- 2x
- Max low sprocket
- 34T
- Min low sprocket
- 30T
- Top sprocket
- 11T
- Total capacity
- 38T
- Max chainring difference
- 17T
- Weight
- 287g (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.