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.
Retailer offers
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Technical data
Specifications
- Weight
- 295 g
- 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
- Electronic shift system
- 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
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
- Sep 25, 2026
- Compatibility review
- Reviewed Sep 25, 2026
Approved technical sources
- ST-R8150 Di2 connector system
- productinfo.shimano.com/en/spec/road-di2-spec-shiftbrake-leverManufacturerSource checked Sep 25, 2026Evidence reviewed Sep 25, 2026
- ST-R8150 exact left/right package
- set.shimano.co.jp/bc_catalog/road.pdfManufacturerSource checked Jul 29, 2026Evidence reviewed Jul 30, 2026