GRX Di2 1x12 rear mech
Shimano GRX RD-RX717 Di2 1x12 Rear Derailleur
A lower-cost, fully wireless 1x12 GRX Di2 rear mech, launched in late 2025 to bring electronic gravel shifting down in price. It shares the removable battery, 10-51T range and impact recovery of the RX827, but uses steel cage plates.
Highlights
Why we rate it
Wireless for less
Gets you fully wireless GRX Di2 shifting for less than the RX827.
Shared battery
Uses the same swappable battery as GRX RX827 and Shimano's wireless XTR, XT and Deore mechs.
Auto impact recovery
Moves itself back into line after a knock, so you can keep riding.
Debris-resistant pulleys
Solid 13T pulleys help keep mud and grit out on wet gravel rides.
Tech specs
Specification
Manufacturer specification. Details may change without notice.
Specification
- Model code
- RD-RX717-SGS
- Speeds
- 12
- Actuation
- Di2 (fully wireless, battery in mech)
- Drivetrain
- 1x
- Cassette
- 10-51T
- Cage
- SGS long, steel plates
- Pulleys
- 13T solid
- Battery
- BT-DN320 (sold separately)
- Clutch
- Shimano Shadow ES
- Connectivity
- BLE and ANT private
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.