Shimano Di2 Junction Box
Best central hub for cyclists building a clean electronic shifting system.
This central hub is the unsung hero of a clean, clutter-free cockpit. It turns a complex web of electronic wiring into a streamlined, reliable system, though it does require a bit of cable management patience during the initial build.
$31.99
at
Cambria Bike
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Who it's for
- Mechanics performing routine maintenance and system diagnostics
- Cyclists building complex setups with multiple satellite shifters
- Minimalists seeking a clean and professional cockpit aesthetic
Who should skip it
- Riders navigating rough terrain or harsh weather conditions
- Owners upgrading to the latest 12-speed wireless groupsets
- Budget-conscious cyclists maintaining older electronic shifting systems
Performance breakdown
Signal Reliability
Ensures consistent, lag-free communication across your entire electronic drivetrain.
Cable Management
Simplifies complex routing for a clean, professional cockpit aesthetic.
Installation Ease
Plug-and-play design makes integrating multiple components straightforward and intuitive.
Build Durability
Rugged construction withstands the vibrations and elements of daily riding.
System Versatility
Four ports provide ample flexibility for custom shifter and accessory configurations.
Component Integration
Seamlessly bridges the gap between derailleurs and shifters for optimal performance.
Key Specs
Model
EW-JC304
Series
DI2
Ports
4
Cable Compatibility
SD300 E-tube wires
Bike Type Compatibility
Road, E-bike, Gravel, Cyclocross, Mountain
Part Type
E-Tube Port Junction
Component Application Area
Frame
Installation Required
Yes
Know before you buy
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Ask Metto anything about the Shimano Di2 Junction Box before you decide.
