The Shimano SW-RS801-T puts electronic shifting right where your hands are when it matters most — on the tops during a climb. These compact satellite shifters mount to your drop bar tops via a 31.8mm clamp band, connecting wirelessly to your existing 12-speed Di2 system through a dedicated SD300 satellite port. Sold as a pair, they give you full rear and front derailleur control without moving your hands from the tops — ideal for road and gravel riders who spend time out of the drops.

Highlights

• Climb with control: Shift gears comfortably from the tops position, keeping a relaxed climbing posture without reaching for the hoods.
• SD300 satellite connection: Plugs directly into the dedicated satellite port on compatible 12-speed Di2 levers — no junction box or additional hardware required.
• Ultralight design: Each switcher weighs just 5.7 g, adding virtually no penalty to your cockpit setup.
• 31.8mm clamp mount: Secure attachment to standard drop bar tops; wrap bar tape over the wire for a clean finish.
• 260mm integrated wire: Pre-fitted cable sized for top-of-bar mounting, routed neatly under tape.
• E-TUBE customisable: Assign shifting direction, front derailleur control, or accessory functions via the Shimano E-TUBE PROJECT app.
• Dura-Ace R9200 series: Engineered to the same standard as Shimano's flagship road groupset.

Handlebar Tops Placement

The SW-RS801-T is designed specifically for the tops position on drop handlebars. The clamp secures the body between the end of your bar tape and the stem, and the 260mm wire tucks neatly beneath the tape. The result is a clean, integrated look with no exposed hardware — just a small tactile button at your fingertips when you need to shift on a long climb.

E-TUBE Programmability

Using the Shimano E-TUBE PROJECT app (iOS/Android or PC), you can reassign each button on the SW-RS801-T to control any compatible Di2 function — rear derailleur shift, front derailleur shift, or even paired accessories such as a cycle computer or light system. This flexibility lets you dial in your cockpit exactly the way you want it.

Compatibility & Fit

The SW-RS801-T is compatible with 12-speed Shimano Di2 groupsets that include a dedicated SD300 satellite shifter port: Dura-Ace R9200 and Ultegra R8100/R8150, as well as compatible 12-speed GRX Di2 levers. Not compatible with Shimano 105 Di2 (R7170) — those levers do not have a satellite port. Clamp diameter: 31.8mm. Sold as a pair.