Shimano Di2 12 speed EW-JC304 4 port junction for SD300
$28.99
Availability:
In stock
SKU
126241
Shimano Di2 12 speed EW-JC304 4 port junction for SD300
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 mountAll Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions.
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