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FC-R9100 Crank The FC-R9100 offers optimum power transmission. This is achieved by its wider HOLLOWTECH II crank arm and a reinforced outer chainring on its unique four-arm asymmetric spider construction. The new R9100 cranksets meet the highest standards in terms of stiffness and lightness.
Power Meter The SHIMANO-R9170 power meter: the essential performance tool for all cyclists who want to unleash their true potential. By collecting accurate and reliable real-time performance data, you can monitor and evaluate every detail of your ride. You can use this insightful information to achieve top results in practice or in races. Power meters are one of the fastest spreading technologies in cycling today. After only a few years, they have become an affordable training tool for amateur road cyclists and enthusiastic recreational riders instead of just being reserved for professionals. The new power meter scores with a reliable electrical system including strain gauges developed in-house. Fluctuating operating conditions - the system is waterproof - are automatically compensated by software. The system starts up quickly and responds directly. Data connection to a computer is possible via Bluetooth LE and ANT+. Firmware updates are also accomplished wirelessly. The integrated lithium-ion battery (lasts for more than 300 h of riding) is rechargeable. Replacing the chainrings does not affect the power meter. In operation during rides, there is plenty of distance to the frame and Shimano direct-mount brakes.
Dura-Ace R9100 The new Dura Ace from Shimano is the answer to the question of many professionals and ambitious amateurs whether and how the current, already immensely high level of performance could be improved even further. Each individual Dura Ace R9100 component is designed to work as efficiently as possible in conjunction with all the other components of the system. This is a particularly clear illustration of Shimano's core philosophy to develop components as a system. The result is called SYSTEM SUPREMACY - the superiority of the system over the sum of the individual parts.