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I’m getting Di2 for the first time and have 9150 crankset, shifters, and front derailleur. I was hoping to leverage the wireless features to - do I need to get the 9150 rear derailleur or can I settle with the 9100 rear derailleur? Thank you so much.

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The Shimano Dura-Ace 9100 series components are mechanical; the 9150 series (Di2) are electronic, so you can't mix a 9150 shifter with a 9100 derailleur.

  • Also.. they're not wireless.. For wireless have a look at SRAM :). – Terry Seidler Jun 22 at 21:44

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