Shimano SM-JC40/41 Di2 Junction Box

$24⁹⁹ $38⁰⁰

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Color

No Color

Size

External Internal

The Shimano SM-JC40/41 Di2 Junction Box typically ships in 5-8 business days

Shimano | SKU: ISMJC40 | Option: No Color, External

This product is HSA / FSA eligible

Pickup available at RA Cycles - Brooklyn

Normalmente pronto em 24 horas

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Shimano SM-JC40/41 Di2 Junction Box Info

The Shimano SM-JC40/41 Di2 Junction Box is the four-port hub that sits at the heart of a Di2 wiring setup — routing connections between the battery, front derailleur, rear derailleur, and Junction A at the stem. Two variants cover the two standard installation approaches: the SM-JC40 mounts externally beneath the bottom bracket shell using the cable guide bolt (two bolt sizes included), while the SM-JC41 sits inside the frame, typically in the downtube or seat tube, secured with double-sided tape or left to rest freely given its compact, lightweight form.

Both boxes use Shimano's plug-and-play EW connector system, making routing and installation straightforward whether you're building a new Di2 drivetrain or replacing an existing junction box.