Shimano Di2 SW-R600 Climber Switch

The Shimano Di2 SW-R600 Climber Switch puts gear changes at your thumbs when your hands are on the tops — whether you're grinding up a climb or staying low and controlled over rough roads. Its curved profile nestles against the handlebar, and two side-by-side buttons handle upshift and downshift without requiring you to reach for the drops.

Out of the box, the SW-R600 is configured to connect to the right-hand Di2 STI lever and control the rear derailleur. With Shimano's E-Tube PC interface, it can be reprogrammed to the left lever and front derailleur instead. Mounting is straightforward — the switch secures to the bar with zip ties, which are included. The approximately 30mm lead plugs directly into one of the ports on a compatible Di2 STI lever, and it can run alongside bar-top sprinter switches if your setup calls for both.

Shimano Di2 SW-R600 Climber Switch Specs at a Glance

• Compatibility: Shimano Di2 electronic groupsets
• Default configuration: Right-hand lever, rear derailleur
• Reprogrammable: Yes, via Shimano E-Tube PC interface
• Mounting: Zip ties (included)
• Cable length: Approximately 30mm lead to Di2 STI lever port