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Shimano 7970 Dura-Ace Di2 derailleur to battery external cable set 2009



To ensure that the signal goes from the shifter to the derailleurs, the reliability of the electric
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Shimano 7970 Dura-Ace Di2 derailleur to battery external cable set 2009
To ensure that the signal goes from the shifter to the derailleurs, the reliability of the electric cable has been proven by repeated field tests in various riding conditions, including extreme temperatures, rain, mud, and cobble stone roads

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