The Shimano GRX RX827 Di2 12-speed groupset is designed for gravel riders who prefer simplicity, control and durability in one drivetrain package. Its 1x layout removes the front derailleur from the equation, resulting in a cleaner build, less adjustment and more room around the drivetrain for demanding off-road use. That makes it a strong option for performance gravel bikes, bikepacking builds and modern all-road setups.
At the center of this setup is the wireless RD-RX827 rear derailleur. Shimano highlights its fast Di2 shifting, impact-deflecting design and built-in Automatic Impact Recovery, allowing the derailleur to recover its position after an impact. Paired with a 10-51T cassette, it gives riders a drivetrain focused on range, resilience and consistent shifting under load.
The combination of a 42T chainring and 10-51 cassette makes this build suitable for both steep climbing and high-speed gravel sections. Hydraulic disc brakes with two 160 mm rotors complete the package with strong, predictable stopping power.
Highlights
- Shimano GRX Di2 1x12 gravel groupset
- Fully wireless shifting platform
- 42T crankset with 10-51T cassette for a wide gear range
- Hydraulic braking with 2 x 160 mm rotors
- Durable RX827 rear derailleur with Automatic Impact Recovery
- OEM packaged
Specifications
- Crankset: RX827, 170 mm, 42T
- Chain: CN-M8100, 118 links
- Cassette: CS-M8100, 10-51T
- Bottom bracket: Press Fit
- Rear derailleur: RD-RX827
- Shifters: RX820 / RX827
- Rotors: CL800, 160 mm, 2 pcs
- Packaging: OEM
