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Shimano EW-JC304 Di2 Junction Box - 4 Ports, Use With EW-SD300 CY8903

$35.63
PRODUCT INFO
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Quantity

93 in stock

Product Description

Shimano Di2 Frame Junction Box
  • Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount
  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/