Shimano E-Tube EW-JC200 2-Port Electric Bike Wire Connector

Shimano Di2 Frame Junction Box

Your Electronic Drivetrain’s Command Hub

Experience flawless gear transitions with Shimano’s essential Frame Junction Box – the central nervous system for premium Di2 electronic groupsets. Designed for road cyclists and gravel adventurers seeking precision performance, this compact unit orchestrates communication between critical components using SD50 E-Tube wiring technology.

Seamless Integration:
– Connects four vital touchpoints: front/rear derailleurs, cockpit junction box, and battery mount
– Ensures instantaneous signal transmission for buttery-smooth shifting during climbs, sprints, or endurance rides
– Reduces cable clutter with streamlined internal routing compatibility

Smart System Management:
⚠️ Critical Performance Tip: All connected Di2 components must share identical firmware versions. Mismatched versions may cause erratic shifting or system failure. Maintain peak reliability by:
1. Using Shimano’s E-Tube Project checker (e-tubeproject.shimano.com)
2. Scheduling seasonal firmware updates
3. Verifying compatibility when expanding your Di2 ecosystem

Why Professionals Choose This Hub:
| Feature | Standard Wiring | Shimano Solution |
|——————|—————–|——————|
| Shift Consistency | Variable | Race-Grade Precision |
| Error Prevention | Manual Checks | Auto-Sync Technology |
| Weather Resistance | Limited | Sealed Connectors |

Ideal for carbon-framed road bikes and performance e-bikes, this junction box delivers:
– Zero hesitation shifts when attacking steep gradients
– Diagnostic simplicity for quick maintenance pre-events
– Future-proof scalability when upgrading components

Installation Tip: Pair with Shimano’s EW-SD50 cables for vibration-free operation on rough terrain. Keep your electronic groupset performing like new – because seamless shifting shouldn’t be compromised.

Compatibility Note: Requires Di2 battery (BT-DN110) and compatible derailleurs. Not for mechanical drivetrain conversion.