Shimano EW-JC302 Di2 Junction Box - 2 Ports, Use With EW-SD300 Chain Tensioners Manufacturer Part Number: TB72910000

Manufacturer Part Number: TB72910000

Manufacturer Part Number: 241-00-005

white green

Manufacturer Part Number: XTB-N34

152030-Q0-L

Shimano EW-JC302 Di2 Junction Box - 2 Ports, Use With EW-SD300 Chain Tensioners Manufacturer Part Number: TB72910000Shimano 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 Product Specifics Today's Stock