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Dura-Ace has gone 12-speed
The shifters have a new and possibly more aero profile, as well as a textured grip
The crankset is more angular and features a dual-sided power meter
Shimano may adopt the XTR MT900 rotors for the road (and we haven’t seen a rim brake version yet)
We don’t know whether the groupset is wired or semi-wireless
Intro
1973: Dura-Ace is launched
Dura-Ace 7400 - Shimano Indexed Shifting (SIS)
Shimano Total Integration (STI)
Dura-Ace 7700 - Hollowtech Technology
Dura-Ace 7900 - Digital Integrated Intelligence (Di2)
Dura-Ace goes black
Hydraulic disc brakes, power meters & synchro shifting
Dura-Ace 9200
Dura-Ace AX
Summary