Ultegra Di2 12-speed STI Levers for Rim Brakes – precise & race-ready.

The Shimano Ultegra ST-R8150 is an electronic brake/shift lever (STI) for 2x12-speed Di2 road bike drivetrains and specifically designed for rim brakes. It combines fast, intuitive shifting with direct and controlled braking performance.

The clearly defined click feeling ensures precise gear changes even under load. The optimized ergonomics with a textured surface improve grip and power transfer – ideal for competition and ambitious training.

Using the E-Tube Project App, shifting modes (Full-/Semi-Synchro-Shift), Multi-Shift, and button assignments can be individually configured. Two EW-SD300 ports allow connection to the battery (BT-DN300) and optional auxiliary shifters.

Highlights:

• Di2 2x12-speed: fast & precise shifting.
• Rim brake version: light & classic.
• Synchro-Shift compatible: Full & Semi.
• Ergonomic design: improved grip.
• Reach adjust: individual customization.

Technical data:

• Manufacturer: Shimano
• Series: Ultegra R8100 Di2
• Model: ST-R8150
• Position: Right (R)
• Brake type: Rim brake
• Shifting system: Di2, 2x12-speed
• Connections: 2x EW-SD300
• Lever material: Aluminum
• Housing: GFRP
• Weight: approx. 295 g (pair, manufacturer's specification)

Scope of delivery:

• 1x Shimano Ultegra ST-R8150 Di2 STI Right | for Rim Brakes | 12-speed
• Note: Workshop packaging (without retail packaging)

Manufacturer's item no.: ISTR8150R | EAN: 4550170889845

"Precise shifting on the road bike - the Ultegra Di2 shift lever ensures instantaneous and crisp gear changes!"