Shimano Dura-Ace Di2 7970 Braze-On Front Derailleur Front Derailleurs

Product Description

The difference in the effort & time taken for front shifts between Dura-Ace mechanical & Di 2 is truly staggering: with programmed automatic motion at the touch of a switch the Dura-Ace Di 2 front derailleur is quick, smooth & effortless, making for unmatched drivetrain efficiency. The difference in the effort & time to actuate the shift between mechanical & Di 2 is truly staggering The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion & stretching, but provides effortless gear shifts. The front derailleur also trims automatically; the cage moves in response to the position of the rear derailleur on the cassette to ensure no chain rub & a quiet unobtrusive ride, enabling you to concentrate on the road ahead. For details on how to install Shimanos Di 2 drivetrain please view their Di 2 Installation guide