The Shimano SW-R600 Switch Shifter is designed for climbers because it allows riders to shift without their hands leaving the top of the bars. A simple thumb operation comes via the small unit, which is located near the stem on the right side of the handlebars.
The SW-R600 Switch Shifter allows you to change gears cleanly and quickly and is great for those who race because you can shift before launching that decisive attack. If you currently use Di2 or are considering an upgrade, the SW-R600 Remote Climbing Shifter is a part you'll want to add.
Compatible with Dura-Ace 9070, Ultegra 6770, and Ultegra 6870 Di2 Systems
Not compatible with Dura-Ace 7970 and not to be used as a primary shifting unit
Built-in E-tube wire