Rear derailleurs
Shimano Shimano RD-RX815
RD-RX815 · IRDRX815
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
Retailer offers
Where to Buy
Compare verified retailer affiliate links or search Amazon. We may earn a commission from qualifying purchases. Please confirm the exact variant before purchasing.
Catalog trust
Evidence and freshness
Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.
Report a correction- Technical review
- Aug 18, 2026
- Compatibility review
- Reviewed Aug 18, 2026
Approved technical sources
- IRDRX815 exact current Shimano sale packageManufacturerSource checked Aug 18, 2026Evidence reviewed Aug 18, 2026
- RD-RX815 Shimano Di2 system compatibilityManufacturerSource checked Aug 18, 2026Evidence reviewed Aug 18, 2026
- RD-RX815 official Shimano specificationsManufacturerSource checked Aug 18, 2026Evidence reviewed Aug 18, 2026
Technical data
Specifications
- Speeds
- 11-speed
- Maximum cassette cog
- 34T
- Supported front chainrings
- 1, 2
- Maximum front difference
- 17T
- Drivetrain family
- Shimano Di2 gravel 2x11
- Shift actuation
- Electronic
- electronicShiftSystem
- Shimano Di2 Sd50
- compatibleElectronicShiftSystems
- Shimano Di2 Sd50
- electronicConnectionMode
- Wired
- Frame mounting
- Conventional hanger
- Total capacity
- 38T