Shimano Dura-Ace Di2 Electronic External Rear Wiring Kit Shoe Brand_Lake Cycling Weatherproof - IPx6 water resistance

Weatherproof - IPx6 water resistance rating

provides warmth and durability

WIND 40 DB

Size: 700 x 20-28c

When the built-in gravity acceleration sensor detects a significant deceleration

Shimano Dura-Ace Di2 Electronic External Rear Wiring Kit Shoe Brand_Lake Cycling Weatherproof - IPx6 water resistanceDetails 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