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.
Details & Specifications
E-Tube Port type:
GRX RX815 (Gravel)