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