Shimano SM-JC41 Di2 Junction Box
Best internal wiring solution for electronic shifting system builders.
This essential component serves as the central hub for electronic shifting systems, neatly tucking away inside the frame for a clean, aerodynamic profile. It reliably manages the connection between derailleurs, the cockpit, and the battery to ensure seamless gear changes.
$38.00
More Di2 options
Shimano SM-JC40 Di2 External Frame Junction Box
$28.99
Shimano Di2 Junction Box
$139.99
Shimano Di2 Junction Box
$31.99
Shimano Di2 Battery Mount
$154.99
Shimano BT-DN110A-7 Di2 Internal Battery
$170.00
Shimano Di2 E-Tube Wire
$30.00
Shimano BT-R1A Di2 Battery
$99.99
Shimano JUNCTION-B
$31.00
Shimano EW-JC200
$25.99
Shimano EW-JC130
$57.60
Shimano Di2 Battery Mount
$84.99
Shimano BCR1 E-Tube Battery Charger
$21.54
Shimano BT-DN320A Battery
$55.00
Shimano SW-RS910 Di2 Junction Box
$21.99
Shimano Di2 Battery BT-DN320
$55.00
Shimano E-Tube Y-Splitter
$52.53
Shimano EW90-A Di2 Cockpit Junction Box
$140.00
Shimano EW90-B Di2 Cockpit Junction Box
$181.32
Shimano SM-EW90-B Junction A
$139.50
Shimano EW-WU111 Wireless Unit
$75.00
Shimano SW-EW90-A
$117.00
Shimano EW-SS302
$25.99
Shimano Di2 E-Tube Wire Cover
$15.00
Shimano Di2 eTube EW-AD305 Conversion Adapter
$23.99
Shimano Di2 E-Tube Y-Split Connector
$54.99
Shimano Di2 E-Tube Battery Mount BMR2
$99.99
Shimano ST-R785 Di2 Shift/Brake
$259.99
Shimano BMR1 and BRM2 Di2 External Battery Mount Base
$47.22
Shimano Power Cable
$14.00
Shimano BT-DN110-1 Di2 Battery
$159.99
Shimano EW-SS302 eBike Sensor Unit
$27.90
Shimano SD50 E-Tube Wire Cover
$15.00
Shimano BM-DN100-L Di2 Battery Mount
$130.98
Shimano Di2 EW-SD50 E-Tube Wire
$30.60
Who it's for
- Cyclists seeking a minimalist aesthetic and aerodynamic frame profile.
- Performance riders who prioritize consistent electronic shifting performance.
- Mechanics working with modern carbon frames with limited internal space.
Who should skip it
- DIY enthusiasts who find internal cable routing frustratingly time-consuming.
- Riders who want immediate access to electronic components for troubleshooting.
- Owners of older frames without dedicated internal routing ports.
Performance breakdown
Integration Cleanliness
Internal mounting keeps cables hidden for a sleek, professional aesthetic.
Connection Reliability
Provides a rock-solid, secure link for all critical electronic components.
Installation Complexity
Requires patience and frame access to route cables through tight spaces.
System Compatibility
Standardizes E-tube connections across most Shimano electronic road drivetrains.
Build Durability
Robust housing protects delicate wiring from internal frame vibrations and moisture.
Weight Efficiency
Minimal mass ensures performance gains without adding unnecessary bulk.
Key Specs
Weight
22.68 grams
Part Type
Junction Box
Mounting Type
Internal
Cable Compatibility
E-tube SD50
Component Application Area
Internal Frame
Know before you buy
Still have a question?
Ask Metto anything about the Shimano SM-JC41 Di2 Junction Box before you decide.
