Di2 Internal Frame Junction Box 4 Port

Di2 Internal Frame Junction Box 4 Port

ISMJC41

Regular price$32.99
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Memorial Weekend Savings | Discount Applied In Cart

California Region

  • San Rafael Available
  • Sausalito Available
  • Berkeley 2-4 days 10-14 days
  • Palo Alto Available
  • San Francisco 2-4 days 10-14 days
  • Sacramento 2-4 days 10-14 days
  • Los Gatos Available
  • Petaluma Available
  • Walnut Creek 2-4 days 10-14 days
  • San Jose 2-4 days 10-14 days
  • Pleasanton 2-4 days 10-14 days
  • Folsom 2-4 days 10-14 days
  • Roseville 2-4 days 10-14 days
  • Stanford Research Park 2-4 days 10-14 days
  • Distribution Center 2-4 days 10-14 days
  • Distribution Center Available

Colorado Region

  • Denver East 2-4 days 10-14 days
  • Denver Downtown Available
  • Highlands Ranch 2-4 days 10-14 days
  • Parker Available
  • Distribution Center 2-4 days 10-14 days

Free shipping on all orders over $49. $9 shipping for orders under $49.

Cannondale, Santa Cruz, Cervelo, Gazelle, BMC, and *other bikes ship for FREE, but Gold Label Assembly will be added at checkout for only $79 (reg. $100) to cover the professional bike build and re-packaging by our certified technicians. It’s bike shop quality, direct to your door!

Some bikes not eligible for shipping due to manufacturer restrictions.

Shop with confidence! It's important to us that you are happy with your Mike’s Bikes purchase so we offer offer a 30-day return/exchange window for your unused gear and 14 days on all bikes. Our exchange and return process is fast and easy. If you choose to exchange for a different size or color, we will ship your product for free.

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Shimano Di2 Frame Junction Box

  • Frame Junction Box connects via SD50 E-tube wires to four different points: front derailleur, rear derailleur, cockpit junction box and battery mount
  • All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
  • Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/