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2009 Shimano Dura-Ace revealed

Even with the on-board battery, the new Dura-Ace Di2 system is purported lighter than Dura-Ace 7800.

  • The electronic version promises much faster shifting than even the mechanical Dura-Ace version.
  • Even with the on-board battery, the new Dura-Ace Di2 system is purported lighter than Dura-Ace 7800.
  • We've spotted prototypes of Shimano's upcoming Dura-Ace gear but how close is this to reality?

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Even with the on-board battery, the new Dura-Ace Di2 system is purported lighter than Dura-Ace 7800.

© James Huang