Shimano GRX FD-RX825 Di2 Front Derailleur - 2x12-Speed Braze-on Down Swing For 46-48t Max BLK/SilverShimano GRX FD RX825 Di2 Front Derailleur 2x12 Speed Braze on Down Swing For 46 48t Max Black Silver. Shimanos GRX RX825 Di2 2x 12 Speed front derailleur delivers quick and precise front shifting even under heavy loads. Designed for a wider 17t gear range it utilizes a +2. 5mm chainline for improved tire clearance. The FD RX825 is compatible with Full Semi Synchronized shift modes as well as the new FRONT SHIFT NEXT function for greater rider