- Designed to be mounted on the right-side top section of a drop bar, adjacent to the stem
- Allows the rider to shift the rear derailleur up or down with the right thumb while in a climbing position
- Includes 265mm length built-in E-tube wire
- A secondary shift unit that fits neatly under your road bars and puts shifting at your fingertips
- Compatible with Shimano E-Tube Di2 systems; not compatible with 7970 Dura Ace Di2
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