Description

and upper tube strong enough to withstand 325 foot-lbs of torque

28mm and 32mm options

One piece alloy body design

accurate front shifts

Shimano SM-JC41 Di2 Internal Junction B Box Groupe and upper tube strong enoughFor 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

Exchange/Return Notes

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Final sale items are not eligible for returns or exchanges.
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Shimano SM-JC41 Di2 Internal Junction B Box Groupe and upper tube strong enough

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