NEW Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port frontder_2x Shot-peened finish

Shot-peened finish

13˚ release angle

5mm thick (compared to the 5mm of Supple Bar tape)

Shimano Dura-Ace BB92

Crown Race: 27

NEW Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port frontder_2x Shot-peened finishShimano 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