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Product Details

Shimano Dura-Ace Di2 5 Port TT Handlebar Junction Box

The removal of traditional mechanical cables in favour of electrical wires not only eliminates poor shifting caused by contaminates, corrosion and stretching but provides effortless gear shifts. The Shimano Dura-Ace Di2 5 Port TT Handlebar Junction Box connects the shifters via E-tube wires to the down tube junction wire. This is a five-port design with a battery level indicator feature so you know when your system needs charging up.

Please note, the stem mounting strap is not included.

Features
  • This junction A is required to connect the shifters via E-tube wires to the down tube junction wire
  • 5-port design
  • Battery level indicator feature
  • E-tube EW-SD50 wires not included
  • Additional charging point when using internal battery
  • Gear index setup switch to allow fine tuning via shifter buttons
  • Reliable and secure water resistant connectors
  • Stem mounting strap included
Specifications
Discipline Compatibility
Road
Brand Compatibility
Shimano
Component Type
Junction
Electronic System
Di2
Family
Dura-Ace
System Type
Electronic
Reviews
Rating 4.8 out of 5
4.8
Value of Product
3.8
Quality of Product
4.8
Rating 5 out of 5
Pauly,
Verified purchaser

Fantastic customer service from Matt, with tech support and customer orders. Great productl Ines and prompt delivery all round. Thank you Sigma sports

Rating 5 out of 5
JKG,
Verified purchaser
Shipping & Returns

Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.

Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.

Q & A

1 question answered

  1. I have an ultegra di2. I am buying TT bar switches. Is the Dura ace 5 port junction box compatible with my set up?

    Asked by Stephen (Ireland)

    1. Hello, I can confirm that this junction box would work absolutely fine for your setup! Kind Regards Liam

      Liam

About Shimano

Shifting the way the world rides.

From a single Osaka workshop in 1921, Shimano has grown into the world's most influential component maker. The brand's relentless engineering — Dura-Ace, Ultegra, GRX, XTR — has shaped the way the world shifts, brakes and rides, on the road and off it.

Shimano's flagship groupset, Dura-Ace, has been the benchmark for top-level road components for more than five decades. Every refinement that lands on Dura-Ace eventually shapes the entire Shimano range, all the way down to entry-level drivetrains.