DISRAELI GEARS

Shimano Dura-Ace (9070)

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The Shimano Dura-Ace (9070) was the first Di2 derailleur that I almost wanted. It was light, precise, reliable, 11-speed and had a load of features that mechanical systems could never match. Shimano even claimed that one configuration of the Dura-Ace (9070) groupset was lighter the equivalent mechanical Dura-Ace (9000) groupset. If, while strolling down a street in 2013, I had found a briefcase neatly packed with $100 notes, I may, just, have bought one.

But even given all this enthusiasm, I can't be polite about the aesthetics. The finishes are pleasant, but the form is dumpy and there is still a whole host of cams and levers hanging, like entrails, out of the bottom.


  • Derailleur brands: Shimano
  • Categories: Shimano - the Dura-Ace story
  • Themes: Electric Avenue
  • Country: Japan
  • Date of introduction: 2012 for the 2013 model year
  • Date of this example: 2013 (two letter date code LF)
  • Model no.: 9070
  • Weight: 215g
  • Maximum cog: 28 teeth
  • Total capacity: 33 teeth
  • Pulley centre to centre: 56mm
  • Index compatibility: 11 speed
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: sprung
  • P pivot: sprung
  • Materials: carbon p-knuckle and pulley cage plates, aluminium b-knuckle and parallelogram plates
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