The Shimano Di2 SM-JC304 Junction is a compact and efficient 4-port connection box designed for the latest E-Tube Di2 systems. It provides seamless cable management and reliable connectivity for modern 12-speed Di2 drivetrains.
Key Features:
- 4-port junction box for connecting EW-SD300 wires.
- Compact, lightweight design for discreet integration.
- Ensures stable and reliable communication across the Di2 system.
- Easy to install and service, ideal for clean internal cable routing.
Who is it for?
Perfect for cyclists upgrading or maintaining a Shimano Di2 12-speed setup who need efficient wire management and secure connections within their electronic shifting system.
Specifications
Mounting Position
Compatibility
Weight
Material
Torque Setting
Biodegradable
Bottom Bracket
Compatible Chains
Lubricant Type
Length
Volume
Manufacturer Warranty
Manual
Cage Length
Total Capacity
Low Sprocket Max
Shifting Actuation
Speed
Number of Chainrings
Top Sprocket Min
What's Included
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