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Shimano Di2 SM-JC40 Junction B Box

Item #: EL250D01
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Shimano Di2 SM-JC40 Junction B Box

The Ultegra Di2 junction box can be viewed as the brains of the operation. All of the wires and battery plug into the junction box.

REVIEW SNAPSHOT®

by PowerReviews
Shimano Di2 SM-JC40 Junction B Box
 
5.0

(based on 2 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

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  • 1 Stars

     

    (0)

Reviewed by 2 customers

Displaying reviews 1-2

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5.0

External Junction Box

By Rhodie roadie

from RI

Verified Buyer

Pros

  • Easy To Install
  • Light Weight

Cons

    Best Uses

    • Any Road Or Cross Riding

    Comments about Shimano Di2 SM-JC40 Junction B Box:

    Installed easily E wires simple to install in it

    • Was this a gift?:
    • No
     
    5.0

    JC40 Junction box

    By Rhody roadie

    from Rhode Island

    Verified Buyer

    Pros

    • Easy to fit

    Cons

      Best Uses

      • Road riding

      Comments about Shimano Di2 SM-JC40 Junction B Box:

      Just wanted to try electronic shifting and now I'm hooked on it. There was no problem with my mechanical shifting, this is just nicer.

      • Was this a gift?:
      • No

      Displaying reviews 1-2

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      Free Shipping Offer

      Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

      Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.