Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port Wheel Skewers & Frame Axles Headset Included

Headset Included

multi-density foam and a thin top-layer of gel for added vibration damping and support

155743-Q0-L

Manufacturer Part Number: EHBRS400AS

Manufacturer Part Number: 168-01-05

Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port Wheel Skewers & Frame Axles Headset IncludedShimano 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