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Shimano
Shimano GRX FD-RX815 Di2 11-Speed Down Swing Braze-On Front Derailleur
Shimano GRX FD-RX815 Di2 11-Speed Down Swing Braze-On Front Derailleur
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$129.99 USD
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$129.99 USD
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Shimano GRX FD-RX815 Di2 Front Derailleur, 11-Speed, Down Swing, Braze-On
Item Description
Shimano GRX FD-RX815 Di2 Front Derailleur – 11-Speed, Down Swing, Braze-On
The Shimano GRX FD-RX815 Di2 Front Derailleur is purpose-built for gravel and adventure cycling, delivering smooth, reliable electronic shifting across mixed terrain. Designed for 2x GRX Di2 drivetrains, this front derailleur features a down-swing, braze-on design with optimized geometry for wider tire clearance. Engineered to accommodate chainstay angles of 61–66° and top gears of 46–50T, it ensures precise, consistent shifts for 11-speed drivetrains in rugged conditions.
Why you’ll like it
- GRX-specific design – engineered for gravel and adventure performance.
- Di2 electronic shifting – delivers precise, reliable shifts at the push of a button.
- Braze-on mount – lightweight and clean installation.
- Down-swing configuration – optimized for frame compatibility and wide tire clearance.
- Supports 46–50T top gear – ideal for gravel and endurance gearing setups.
- Chainline: 46 mm – designed to match GRX 2x drivetrains.
What’s in the box
- 1 × Shimano GRX FD-RX815 Di2 Front Derailleur (braze-on, down swing)
Tech specs
| Manufacturer | Shimano |
|---|---|
| Series | GRX |
| Model | FD-RX815 |
| Manufacturer Part # | KFDRX815F |
| Speed | 11-speed (front) |
| Mount Type | Braze-on |
| Configuration | Down swing |
| Chainstay Angle | 61–66° |
| Top Gear Capacity | 46–50T |
| Chainline | 46 mm |
| Application | Gravel / Adventure / Endurance road (Di2 electronic) |
Fit notes
- Designed for Shimano GRX Di2 2x 11-speed drivetrains.
- Requires Di2 wiring and shifters (sold separately).
- Braze-on mount; an adapter may be required for clamp-style frames.
- Compatible with top gear chainrings between 46–50T.
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