Shifters: Shimano Dura Ace Di2. Front Derailleur: Shimano Dura Ace Di2. Rear Derailleur: Shimano Dura Ace Di2. Brakes: Shimano Dura Ace Di2 [F]160mm, [R]140mm. The only thing replaced is the original dura ace wheel set for a hand built set of EC cycles wheels.
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