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New seat post bracket SP-15 which fits contemporary (kammtail) aero seatpost
and improved performance over time
and charge down aggressive terrain
so you can ride longer without feeling like you've been through the wringer
the Defy Advanced Elite is ready to help you go fast
Shimano SM-JC41 Junction Unit fitness New seat post bracket SP-15Keep 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