What Is It?
The Shimano GRX RD-RX810 2×11 Rear Derailleur is a premium 11-speed gravel rear derailleur engineered for 2×11 Shimano GRX drivetrains. Designed specifically for mixed-surface riding, it features Shimano SHADOW RD+ technology, which incorporates a switchable chain stabiliser to reduce chain slap, improve chain retention, and deliver quieter, more secure shifting on rough terrain.
With a maximum low sprocket size of 34T, the RD-RX810 offers smooth, reliable shifting across a wide gear range, making it ideal for gravel racing, bikepacking, endurance riding, and adventure cycling. Its low-profile design also helps protect the derailleur from impacts on technical terrain.
Key Benefits
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Designed for 2×11 GRX Drivetrains: Optimised for Shimano GRX 11-speed gravel groupsets.
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SHADOW RD+ Chain Stabiliser: Reduces chain slap and improves chain retention on rough roads and trails.
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Smooth, Precise Shifting: Delivers reliable gear changes across the full cassette range.
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Low-Profile Design: Minimises the risk of damage from rocks and trail obstacles.
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Wide Cassette Compatibility: Supports cassettes with up to a 34T largest sprocket.
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Optimised for Gravel Riding: Tuned chain tension and geometry enhance drivetrain performance on mixed terrain.
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Lightweight Aluminium Construction: Offers an excellent balance of strength, durability, and weight.
Specifications
| Specification |
Details |
| Product |
Shimano GRX RD-RX810 Rear Derailleur |
| Series |
GRX RX810 |
| Speed |
11-Speed |
| Drivetrain |
2×11 |
| Technology |
SHADOW RD+ |
| Mount Type |
Direct Attachment (Standard Hanger) |
| Maximum Low Sprocket |
34T |
| Minimum Low Sprocket |
30T |
| Maximum Top Sprocket |
11T |
| Minimum Top Sprocket |
11T |
| Total Capacity |
40T |
| Compatible Chain |
Shimano HG-X11 / HG-EV 11-speed |
| Average Weight |
Approximately 255 g |
Compatible Components
The Shimano RD-RX810 is designed for use with:
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Shimano GRX RX810 2×11 shifters
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Shimano GRX RX600 2×11 cranksets
- Shimano 11-speed HG road and gravel cassettes (11-30T to 11-34T)
- Shimano HG-X11 and HG-EV 11-speed chains
- Standard Shimano-compatible derailleur hangers
Who Is This Best Suited For?
The Shimano GRX RD-RX810 2×11 Rear Derailleur is ideal for:
- Gravel riders
- Adventure cyclists
- Bikepacking enthusiasts
- Endurance road riders
- Cyclocross riders
- Mixed-terrain commuters
- Riders upgrading or replacing a Shimano GRX 2×11 rear derailleur
- Cyclists seeking quieter operation and improved chain security on rough terrain
Compatibility Note: The RD-RX810 is designed exclusively for Shimano GRX 2×11 drivetrains and supports 11-30T to 11-34T 11-speed cassettes with a maximum total drivetrain capacity of 40T. It should be paired with compatible Shimano GRX 11-speed shifters and an HG-X11 or HG-EV 11-speed chain for optimal shifting performance.
