The FD-R9250 is Shimano's new Di2 Front Derailleur, working with the semi-wireless R9250 groupset released in 2021.
It works with the BT-DN300 battery and EW-SD300 Electric Wire.
This front derailleur is meant to be used with a 12 speed rear derailleur. It most likely won't work with existing 11 speed derailleurs.
BikeRadar published a page on prototypes of these derailleurs being used in races, with photos shot by Cor Vos.
Details & Specifications
|Shimano model number:||FD-R9250-F|
|E-Tube Port type:||SD300|
|Component series:||DURA-ACE R9250 (Road)|