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. Features Wider tyre clearance. Chainline +2.5 mm vs. conventional road FD. Wider range front gearing. 17T front range.
Best Price: £99.00 from Merlin Cycles