Dura-Ace 9000 power meter

The SRM PowerMeter has been the standard for cyclists for many years. Its reputation for reliable data has made it one of the most sought after. This is the ultimate tool for efficient training. Whether you’re a triathlete, a racer or a weekend warrior, you’ll definitely benefit from the precision and reliability of SRM.
The new SRM PowerMeter 11-Speed is the next generation of seamless drivetrain integration for Shimano groupo users and Power enthusiasts. Improving over the 7900 series SRM PowerMeter, the 11-Speed now boasts 3000 hours of battery life! With an accuracy of ±1% you’re sure to have reliable data. Being ANT+ compatible, the SRM PowerMeter will work with any ANT+ cycling computer, like Garmin, but you can also use SRM’s PC8 unit which is training focused.
Shimano developed new Dura-Ace 9000 chain rings which are 20% stiffer than previous rings. This not only benefits the shift, but also in power transfer from the crank arm through the spider and into the drivetrain. Also, with electronic shifting systems the forces on the chain rings are much higher than with mechanical derailleurs. If you ride Shimano Dura-Ace 9000 mechanical or Di2 electronic, you will benefit from increased power transfer.