NEW Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port variant-size-15-5 - Low viscosity grease and

- Low viscosity grease and optimized fill percentage hits the perfect balance between durability and minimal friction

double-butted main triangle and 44mm headtube

Shimano down tube outer cable housing stoppers lets riders convert their shift bosses to cable stops

Dimension 26

NEW Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port variant-size-15-5 - Low viscosity grease andShimano 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