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Review on πŸ”Œ SHIMANO Ultegra Di2 Junction Box with Internal Routing by David Berry

Revainrating 5 out of 5

Internal Wiring Junction Box - Invalid Image

If you're looking to route Di2 wiring inside the frame, this is the part you need. The photo shows a box with an external mount, but I received an inner box. Simply remove the handle, connect the 4 cables, put them back into the frame tube, reinstall the protective cover and handle, done. A very clean shifting perfection setup!

Pros
  • Crank Compatibility: 2 x 10
Cons
  • Disappear