Shimano GRX DI2 FD-RX815-F Braze-ON 2x11 Front Derailleur 17TSHIMANO GRX DI2 Front Derailleur Gravel 2x11 speed The SHIMANO GRX RX815 DI2 front derailleur delivers quick and smooth front shifting even under high pedaling torque. It's designed for a wider, 17T front range and it has programmed chain guide trim settings and can be used in full or semi SHIMANO SYNCHRONIZED SHIFT modes. Wider tire clearance Chainline +2. 5 mm vs. conventional road FD Wider range front gearing 17T front range