Shimano's Dura-Ace R9200 12-Speed Di2 Groupset takes all of the benefits of an electronic drivetrain and enhances it for improved shifting, quieter operation, and less maintenance. This groupset sets a new mark in road performance, and it's developed with a reliable cockpit, refined ergonomics, and an improved brake system. Plus, integrated digital technology for those of us who won't settle for less than the best. Shimano's evolved Di2 platform features the fastest shifting available that's designed for ultimate performance. Optimized 12-speed gearing enhances efficiency and the brand's Hyperglide+ technology makes for seamless shifts no matter how hard we're pedaling. Unparalleled ergonomics make for steady confidence on our ride, plus a cleaner cockpit design, and the new Dura-Ace brake system is maintenance-friendly with absolute control over our braking power. This groupset is highly reliable with precision shifting and wireless connectivity. Gearing options are optimized for performance and speed without sacrificing efficiency, and the braking power available leaves us free to tackle tight turns and barreling descents.