2x12 speeds electronically controlled, disc brake Product description Shimano 105 R7100 Di2 Groupset The latest SHIMANO 105 introduces Di2 shifting to a wider audience of cyclists. For riders accustomed to mechanical shifting and traditional ergonomics, SHIMANO 105 Di2 signifies a significant enhancement in the road cycling experience. Drawing on features and technologies from DURA-ACE and ULTEGRA, SHIMANO 105 represents the culmination of extensive research and development. With a unified Di2 platform, advanced ergonomics, specially optimized gear combinations, and a superior braking system, the new SHIMANO 105 ushers in a new era of accessible performance.