Shimano GRX RD-RX817 Di2 Rear Derailleur
Product Details
The Shimano GRX RD-RX817 Di2 Rear Derailleur is designed specifically for gravel and adventure riding, delivering fast, precise electronic shifting performance across rough and variable terrain. As part of Shimano’s GRX 11-speed Di2 ecosystem, it is built to maintain stability and control in demanding off-road conditions.
The derailleur is compatible with Shimano 11-speed drivetrains and supports cassette ranges up to 11–42T, making it suitable for both steep climbing and fast gravel riding. It features Shimano’s Shadow RD+ technology, which uses an integrated clutch mechanism to increase chain tension, reduce chain slap, and improve drivetrain stability on uneven surfaces.
Designed for use with Shimano Di2 electronic shifting systems, the RD-RX817 delivers consistent, reliable shifting performance with reduced effort and improved precision compared to mechanical systems.
Key Features
- Di2 Electronic Gravel Drivetrain Integration – Designed for Shimano GRX 11-speed electronic shifting systems
- 11–42T Cassette Compatibility – Supports wide-range gearing for steep climbs and mixed-terrain riding
- Shadow RD+ Clutch System – Improves chain stability and reduces slap on rough terrain
- Gravel-Optimized Design – Built for reliable shifting performance under demanding off-road conditions