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and charge down aggressive terrain
New seat post bracket SP-15 which fits contemporary (kammtail) aero seatpost
slip-resistant composite handle
The patented dual-stage locking mechanism ensures a secure attachment to all Quad Lock mounts
Shimano SM-JC41 Junction Unit fitness and charge down aggressive terrainKeep your Di2 system running seamlessly with the Shimano SM JC41 Internal Junction Unit, the hidden hub that brings your entire electronic drivetrain together. Designed for internal cable routing, this compact junction boxcommonly referred to as Junction Bacts as the central connection point for all key components, ensuring fast, reliable communication across your setup. Whether youre building a clean new bike or upgrading an existing Di2 system, the
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