10/11-speed Di2 beginner's guide to Di2
Just bought a new Di2 bike? This page explains what the buttons do, how to charge (and how often) and what synchronized shfit does.
Front Derailleur
GRX FD-RX815-F
The Shimano GRX RX815 Di2 gravel front derailleur was developed to handle the different GRX chain line (+2.5mm outwards) perfectly. It is meant to be used with the GRX RD-RX815, but will work with road rear derailleurs too.
Its total capacity is 17T and supports 46-50T top gear teeth.
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Specifications
- Model code
- FD-RX815-F
- Series
- GRX (RX815)
- Weight
- 135g
- Speeds
- 11
- SD50 ports
- 1
- Total capacity
- 17T
- Chain line
- 47mm
- Top gear teeth
- 46T - 48T
Related components
View all componentsRelated pages
Installation Guide: GRX FD-RX815 / Ultegra FD-R8050 / DURA-ACE FD-R9150 Di2 Front Derailleur
Bought a new Di2 derailleur or have to replace your old one? Read FD-rx815 / FD-R8150 / FD-R9150 Di2 Front Derailleur installation instructions here.
Synchronized Shifting - the complete guide
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Set up Front Derailleur limits (FD-RX815, FD-R9150, FD-R8050)
Read how to set up your two-adjustment-bolt Di2 Front Derailleur (Ultegra FD-R8050, DURA-ACE FD-R9150, GRX FD-RX815)
Understanding Di2 derailleur specifications
Shimano front derailleur and rear derailleur specifications... what do they mean, really? This page explains all of them, and why they matter.