Sale
Shimano Di2 EW-JC304 Junction Box: 4-Port Electronic Shifter Hub for EW-SD300
Original price was: $31.99.$9.49Current price is: $9.49.
Description
Shimano Di2 Frame Junction Box – The Intelligent Nerve Center for Your E-Bike System
Upgrade your cycling experience with Shimano’s Di2 Frame Junction Box, the essential hub that seamlessly integrates all electronic shifting components. Designed for road and gravel bikes equipped with Di2 technology, this compact yet powerful unit ensures flawless communication between your derailleurs, cockpit controls, and battery.
Key Features & Benefits
- Multi-Point Connectivity: Links via SD50 E-Tube wires to four critical Di2 components—front/rear derailleurs, cockpit junction box, and battery mount—for synchronized performance.
- Firmware Compatibility: Ensures all Di2 parts operate on the same firmware version (check/update via Shimano’s E-Tube Project) to prevent malfunctions and optimize responsiveness.
- Plug-and-Play Design: Simplifies installation for cyclists and mechanics alike, reducing setup time while maintaining a clean, wire-concealed aesthetic.
Why Choose Shimano’s Junction Box?
| Feature | Shimano Di2 Frame Junction Box | Generic Alternatives |
|---|---|---|
| Compatibility | Optimized for all Di2 systems | Limited to specific models |
| Reliability | Firmware-synced precision | Risk of version conflicts |
| Durability | Weather-resistant construction | Prone to connectivity issues |
Ideal for performance-driven cyclists and bike builders, this junction box is the backbone of Shimano’s electronic shifting system, delivering crisp gear changes and long-term reliability. Pair it with the Di2 System Checker for effortless maintenance and firmware updates.
Ride smarter. Shift smoother.
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