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.
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
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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
Synchronized Shifting - what is it exactly? What does it do and how can you set it up? This page will guide you through the process of setting up synchro shift.
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)
Manuals & other documents
Firmware updates
Below is an overview of all known firmware updates for this component. The changelog texts are Shimano's, and quite often they're a bit cryptic - sorry!
3.2.1
Firmware uploaded