Shifters
Shimano Ultegra ST-R8150 Di2 Shift/Brake Lever Set
Left/right 2×12 cable-brake set
Requires companion components
Electronic shifting system requirements are not fully modeled.
Package contents
Included Components
- Shimano Ultegra ST-R8150 Di2 Shift/Brake Lever Set · Left included control
- Shimano Ultegra ST-R8150 Di2 Shift/Brake Lever Set · Right included control
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
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Catalog trust
Evidence and freshness
Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.
Report a correction- Technical review
- Aug 18, 2026
- Compatibility review
- Reviewed Aug 18, 2026
Approved technical sources
- ST-R8150 Di2 connector systemManufacturerSource checked Aug 18, 2026Evidence reviewed Aug 18, 2026
- ST-R8150 exact left/right packageManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 30, 2026
Technical data
Specifications
- Speeds
- 12-speed
- Supported speeds
- 12-speed
- Compatible drivetrain families
- Shimano Ultegra Di2 12-speed
- Front drivetrain groups
- Shimano Ultegra Di2 2x12
- Front speeds
- 2x
- Shift actuation
- Electronic
- electronicShiftSystem
- Shimano Di2 Sd300
- Control style
- Drop Bar Integrated
- Brake control interface
- Short Pull Cable
- Control clamp diameter
- 23.8 mm
- Included control sides
- Left, Right
- Left control functions
- Brake, Front Shift
- Right control functions
- Brake, Rear Shift