The Shimano SM-JC41 Junction Box is a key component of Shimano’s Di2 electronic shifting system, connecting multiple E-tube wires internally. Compact and reliable, it ensures clean wiring and consistent signal transfer for flawless Di2 operation.
Key Features
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4-port internal junction box for Di2 systems.
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Connects shifters, derailleurs, and battery units.
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Compact, lightweight design.
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Reliable E-tube connectivity.
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Essential for internal routing setups.
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