The slickest item in the group is the auto-trim function of the front derailleur. The computer knows to trim the front derailleur when the rear is at either extreme end of the cassette.  |  Photo: Matt Pacocha
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Outdoor Demo 2008: The new Dura-Ace Electric front derailleur.
The slickest item in the group is the auto-trim function of the front derailleur. The computer knows to trim the front derailleur when the rear is at either extreme end of the cassette.  |  Photo: Matt Pacocha
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