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Recently on Cyclingnews.com Dauphiné Libéré Photo ©: Sirotti	Tech feature: Shimano Dura-Ace Di2 introduction, August 31, 2008 The standard Dura-Ace rear derailleur houses the conventional coil spring within the parallelogram but the Di2 unit just needs the stepper motor. Photo ©: James Huang/Cyclingnews.com Previous photo    Next photo Latest Photography   Related Gallery   Related Story

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