Index Rear Derailleurs and set Front Derailleur limits using E-Tube Project
Learn how to set up your di2 front derailleur electrical limits and index or micro-adjust your di2 rear derailleur using E-Tube Project 4.
Front Derailleur
GRX FD-RX815
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
- Series
- GRX RX815
- Weight
- 135g
- SD50 ports
- 1
- Chain line
- 47mm
- Total capacity
- 17T
- Top gear teeth
- 46T - 48T
Related components
View all components
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.
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
What is a rear derailleur's total capacity, really? Why is there a top sprocket minimum? And what about front derailleurs? Chain line, total capacity, Top gear teeth? This page explains all of those, and more.