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The difference in the effort and time takenfor front shifts between Dura-Ace mechanical and Di2 is truly staggering: withprogrammed automatic motion at the touch of a switch the Dura-Ace Di2 frontderailleur isquick, smooth and effortless, making for unmatched drivetrainefficiency
Features:
The biggest difference you will notice isjust how much quicker and effortlessly smoother shifting on the frontchainrings is, even under load
The difference in the effort and time toactuate the shift between mechanical and Di2 is truly staggering
The removal of traditional mechanicalcables in favour of electrical wires not only eliminates poor shifting causedby contaminates, corrosion and stretching, but provides effortless gear shifts
The front derailleur also trimsautomatically; the cage moves in response to the position of the rearderailleur on the cassette to ensure no chain rub and a quiet unobtrusive ride,enabling you to concentrate on the road ahead
High tolerance cold forged aluminium andcomposite construction
Braze-on fit as standard; if your bike doesnot have a braze-on mount seat tube adapters are available
10-speed Dura-Ace Di2 compatible
Front derailleur weight is 124 grams