The new design of the Shimano Dura-Ace FC-R9200-P 2 x 12-speed HOLLOWTECH II power meter crankset not only brings a cult-like look and aesthetics, but also ensures even better performance. The new dual sided power meter with optimised accuracy (±1.5 %) sets a new standard in power measurement.Shimano has been working for years to provide you with an advantage of seconds. The new 12-speed DURA-ACE R9200 is the fastest groupset ever and the pinnacle of SHIMANO technology and innovation. Speed was the key driver for the development of this new generation road groupset. That's why every component has been revised, refined and optimised to make you even faster - whether to leave the peloton behind you or to win the final sprint on the Champs-Élysées.The DURA-ACE FC-R9200 crankset performs two crucial tasks: It converts pedal power into driving force and ensures extremely fast and precise front shifting. At the same time, the new dual-sided FC-R9200-P power meter processes all this data with outstanding accuracy. In addition, the lightweight HOLLOWTECH II crank arms and SHIMANO's leading chainring design further contribute to the FC-R9200's top ranking! Furthermore, it is available in various crank arm lengths and with different chainring options, ensuring that everyone will find the perfect crank for their needs. FEATURES Integrated design Reliable electric system Waterproof in all conditions Easy maintenance Integrated rechargeable battery Battery charged for less trouble Easily change chainrings without affecting power Clearance with frame Enough clearance with our direct mount brake caliper Accurate data collection ±1.5% accuracy of strain gage measured power in full-range Stable power measurement system at the various stepping positions Active temperature compensation Own developed strain gauge Software compensate automatically Quick response and operation without stress Possible to start quickly Simple zero reset with switch on transmitter Direct response Both left and right side connected with cable Magnet based cadence Bluetooth LE and ANT+ Wireless firmware update system HOLLOWTECH II crankset Optimum power transfer Best balance for lighter weight and efficiency New designed crank arm Maintains high rigidity and reduces weight 4-arm construction crankset Iconic design SPECIFICATIONS Use: Road Group: Dura-Ace R9200 Model: FC-R9200-P Gradation: 50-34T Q-factor: 146mm Threaded BB shell width: 68 / 70mm Gear front: 2-speed Gear rear: 12-speed Construction: Hollowtech II Compatible chain: CN-M9100 HG 12-speed PCD: 110mm Chain line: 43.5mm Crank arm length (choose variant) 170mm 172.5mm 175mm Material Crank arm: Aluminum Anodized Crank axle: Steel Plated Large Chainring: Aluminum Anodized / CFRP Small Chainring: Aluminum Anodized Color: Series color TECHNOLOGIES Power meter The power meter ‘brain’ sits inside the Dura-Ace drive crank body (the spider) and the strain gauges sit inside the crank arms to measure left and right leg power. The brain is discrete and compact, providing a system that’s one of the lightest and cleanest on the market. Because the power meter is connected to the spider, chain rings can be easily changed without affecting the power meter’s accuracy. The system checking and firmware upload can also be operated by your smart phone or tablet PC through a Bluetooth connection (E-TUBE). An integrated rechargeable battery powers the unit. This can be charged with a small magnetic adapter without needing to remove covers or casings. HOLLOWGLIDE - Hollow technology on outer chainring High rigidity hollow structure cuts down on weight yet maintains strength. Better power transfer and quicker and more precise front shifting. HOLLOWTECH II - Providing the best balance of stiffness, strength, weight and rotating performance. The concept of HOLLOWTECH II technology is focused on producing a superior crankset which will maximize a rider’s power transfer. The rigidity of the crankset ensures pedaling efficiency while its weight, a key element of the crankset, you want light, aids in cycling longer distances over which the rider needs to pedal more. Naturally, SHIMANO strove for the optimum balance between the conflicting needs of stiffness while producing a lightweight crank. HOLLOWTECH technology is an ultra-lightweight hollow crankarm created by SHIMANO with the company’s own proprietary forging technology that also maintains rigidity. The addition of HOLLOWTECH II technology integrates the bottom bracket axle with the right crankarm for more stiffness and a weight savings to achieve a high-dimensional balance. Its outboard bottom bracket bearing system provides better weight distribution and more pedaling stability, allowing for more efficient power transfer.