Shimano's twelve-speed GRX RX825 Di2 gravel front derailleur was designed to be used with a 47mm chain line (+2.5mm compared to 12-speed road) . It is meant to be paired with the GRX rear derailleur, RD-RX825, but it'll work with other 12-speed road derailleurs and shifters too.
The derailleur's total capacity is 17T and supports 46-50T top gear teeth.
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Just like the 12-speed 105 front derailleur, this FD-RX825 has one top limit screw and one electronic limit.
If you want to build a 1x GRX bike, you can omit the front derailleur. You don't have to install it in order for the bike to work.
Twelve-speed Di2 Front Derailleurs do not have any limit bolts, so installing the derailleur and setting the limits is different from what you're used to. Don't worry, though, it's easy! I'll show you how to install the 12-speed Di2 front derailleur, and set its limits and micro-adjustment.
Just bought a new 12-speed Di2 bike? This page explains what the buttons do, how to charge, and what synchronized shfit does.
Read how to set up your GRX / 105 12-speed Di2 Front Derailleur - FD-RX825 / FD-R7150.
