With Di2 winning on asphalt, the new GRX groupset brought the same technological advantages to the gravel rider. Undoubtedly, after its inception the power meter quickly became instrumental in training and racing at all levels. With envious groupset performance already in hand, it was time to turn to personal performance, and Shimano’s first dual-sided power meter was also offered as an option, bringing with it a crankset with an all-new appearance its much larger, asymmetric crank arm aimed to provide better shifting at a lower weight. The mountain bike tech influence didn’t stop at disc brakes though, new, low-profile SHADOW RD rear derailleurs that match with sprockets up to 30T increased DURA-ACE’s versatility among a wider spectrum of riders seeking more diverse terrain and challenges. While Di2 saw further enhancement through the addition of SYNCHRONIZED SHFITING – a development that enabled the groupset to control both derailleurs – the arrival of DURA-ACE R9150 also saw the first top-tier hydraulic disc brake option integrated seamlessly into the DURA-ACE family. By now its performance and reliability was proven by its adoption as the default choice among the professional peloton, along with its huge growth in popularity among amateur cyclists too.

Only six years after its launch, Di2 was already a maturing technology.