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Need help?Do you have a question about the Shimano GRX RD-RX815 and is the answer not in the manual?
Explains the system's gear position control functionality.
Detailed steps for adjusting the rear derailleur.
Detailed steps for adjusting the front derailleur.
Overview of E-TUBE PROJECT for settings and firmware updates.
Configuration of synchronized and semi-synchronized shift modes.
Procedures for maintaining brake pads, mineral oil, and hoses.
Explains the system's gear position control functionality.
Detailed steps for adjusting the rear derailleur.
Detailed steps for adjusting the front derailleur.
Overview of E-TUBE PROJECT for settings and firmware updates.
Configuration of synchronized and semi-synchronized shift modes.
Procedures for maintaining brake pads, mineral oil, and hoses.
General| Series | GRX |
|---|---|
| Model | RD-RX815 |
| Cage Length | Medium |
| Max Sprocket Size | 42T |
| Min Sprocket Size | 11T |
| Low sprocket_Max. | 42T |
| Low sprocket_Min. | 11T |
| Top sprocket_Max. | 42T |
| Top sprocket_Min. | 11T |
| Max. front difference | 17T |
| Di2 connectivity | Yes |
| Firmware update by E-TUBE PROJECT | Yes |
| SD5 port (pcs) | 1 |
| SD3 port (pcs) | 0 |
| E-tube port (pcs) | 1 |
| E-tube connector (pcs) | 1 |
| Actuation Ratio | 1.4 |
| Mounting Type | Direct Mount |
| Compatibility | Shimano 11-speed |
| Material | Aluminum |
| Compatible chain | HG-X11 |
| Pulley_Teeth | 13T |
