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Shimano Di2 E-Tube SM-EW90A 3-Port Junction Box

SM-EW90-B 5-Port Cockpit Junction Box connects Di2 shifters to the frame junction box via SD50 E-tube wires. The 3-port Cockpit junction box does not allow for the multiple satellite shifting options like the 5-port but it is a little lighter and sleeker.


  • OEM front wiring kit for Dura-Ace Di2 9070 and Ultegra 6870
  • LED battery charge level indicator
  • Rear derailleur adjustment mode
  • Internal battery charging port

All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions.

Sale Price
Reg Price $119.95
Available on 11/20/2019


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