Shimano Dura-Ace Di2 Electronic External Rear Wiring Kit Bike Accessories_Saddles Color: Black Bag Size Class:

Color: Black Bag Size Class: Medium (101-200 c

Redesigned FC for greater frame compatibility

but with some key differences

Nylon Composite body

Shimano Dura-Ace Di2 Electronic External Rear Wiring Kit Bike Accessories_Saddles Color: Black Bag Size Class:Details Shimano's Dura Ace Di2 takes shifting to the next level. The Rear Wiring Kit connects to both the left and right shifters and Junction Box A (which displays battery power and allows manual adjusting). It also includes a battery mount, cable covers to route and hide the cables and a wire plug unplug tool. The External Kit is meant to be run on the outside of the frame. Most 53 to 59cm frames use a Medium (830mm) Rear Wiring Kit. See our diagram