brand: Shimano model: Ultegra R8150 Di2 Groupset type: Electronic Road Bike Groupset series: Ultegra R8100 speed: 12-Speed drivetrain: 2x12-Speed shifting system: Shimano Di2 Electronic Shifting brake type: Rim Brake compatibility: Shimano 12-speed road drivetrain components with compatible rim brake calipers and wheelset material: Aluminum alloy and composite components finish: Black technology: Shimano Di2 electronic shifting, Hyperglide+ technology, and synchronized shifting functionality features: Fast and precise electronic shifting, smooth gear changes, ergonomic control levers, lightweight construction, and reliable road cycling performance use case: Road cycling, racing, endurance riding, training, and performance road bike builds condition: Original / Genuine color: Black