Shimano SM-JC41 Di2 Internal Junction B Box Fe Sport The kit contains extra-long inner

The kit contains extra-long inner cables and ample housing for large frames or continuous housing runs

The Corsa has been the race-day choice of pros for years

Torque Spec: Face Plate 5

External Cup (EC) — 12mm bottom

Removable Presta valve core

Shimano SM-JC41 Di2 Internal Junction B Box Fe Sport The kit contains extra-long innerFor internal DI2 wire routing, SHIMANO's SM JC41 Junction B is the central connector for DI2 systems. Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4 port SM JC41 junction, which is housed inside the bike frame. Specifications For internal wire routing Mfr Claimed Weight 4. 1g