Skip to content
Free Shipping on Orders over $100 and Easy Returns!
Free Shipping on Orders over $100!
Shimano Di2 E-Tube 4 Port Junction B - (SM-JC40 or SM-JC41)
Shimano

Shimano Di2 E-Tube 4 Port Junction B - (SM-JC40 or SM-JC41)

$43.99 - $43.99
$43.99
$43.99 CAD
$43.99 - $43.99
$43.99 CAD
Colour: Internal
Size: Internal
Request Price Match Notify Me when it's on Sale
Shipping

$15 Standard shipping. Free shipping on orders over $100. Standard Shipping is 4-10 business days. Express shipping is 1-3 business days between major centres. Bikes, trainers, bike cases, wheels are excluded. Additional exclusions may apply.

View our full shipping policy here.

Returns & Warranty

60-day Return Policy
You can return any current product in new and saleable condition (with any tags or packaging) within 60 days for a full refund, credit or exchange. Does not apply to items part of our (Re)Cycle Consignment inventory. A $15 return shipping fee applies to orders that are shipped out. Additional exclusions may apply.

View our full return policy here

Warranty
Most items we sell are covered by a manufacturer's warranty. The terms and duration of the warranty will be listed on the item packaging or documentation. More detailed information may be available on the manufacturer's website.

Notify me

Your Contact Information:

Product Details:

Price Match

If you find a lower advertised price (including shipping, handling and delivery) that is currently available on an identical branded item with the same features from a local retail competitor, compete this form and Enduro Sport will do our best to match that total price. Please read the complete conditions below.

Your Contact Information:

Price Match Details:

Email offers can be forwarded to shop@endurosport.com (please make sure your send them from the same email address as you entered on this form).

The Shimano Di2 Junction B box is the center of the e-tube Di2 system. All of the component and battery wires meet here before running out to their respective components. All of the wires that connect to the junction box use the same connector to make assembly that much easier. Choose the SM-JC40 External box if you are running your wires on the exterior of the frame or choose the SM-JC41 internal box if you are running your wires inside your frame.