Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port MFPN=102505100 1/2" x 1/8" teeth

1/2" x 1/8" teeth

TechLiner - State-of-the-art TLR casing technology with an inner rubber layer for maximum pressure retention

Run time: 5 hours

Rapidaptor quick-release chuck allows rapid bit change

Integrated high strand 10mm cable lock

Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port MFPN=102505100 1/2" x 1/8" teethShimano Di2 Frame Junction BoxFrame 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