SHIMANO Ultegra R8100-P 12s Hollowtech II Crank With Power Meter 172.5 mm

Offering all the precision and functionality of the DURA-ACE power meter, the ULTEGRA FC-R8100-P power meter comes in a more affordable package. Scientific training requires accurate measurement and user-friendliness, and the new ULTEGRA R8100 power meter has both. Its dual-sided measurement is accurate within 1.5% and zero offset calibration is a quick and easy process. Perhaps most importantly, its long battery life, easy recharge, and ANT+ and Bluetooth®LE connectivity makes using and recording your workouts easier than ever. Integrated, waterproof, and rechargeable Li-ion battery - Up to 300+ hours (TBD) of ride time Depending on ANT+/Bluetooth®LE settings Accurate data collection ±1.5% (TBD) strain gage accuracy throughout the entire calibration range * Depending on ANT+/Bluetooth®LE settings - Proprietary strain gauge Possible to start quickly: - Simple zero offset calibration with switch on transmitter Active temperature compensation: - Software automatically compensates for temperature changes Specifications: - Average weight: 769 (52-36T) 758 (50-34T) - Remarks: Crankset specifications not listed here are the same as FC-R8100 - Chainring combination: 52-36T 50-34T - Crank arm length (mm)_165: X (52-36T) - (50-34T) - Crank arm length (mm)_170: Yes - Crank arm length (mm)_172.5: Yes - Crank arm length (mm)_175: Yes - Firmware update by E-TUBE PROJECT: Yes - Accuracy (%): TBD - Active temperature compensation: Yes - Battery_Charging cable: EW-EC300 - Battery_Charging port: Yes - Battery_Life: 300 h or longer - Battery_Type_Lithium ion: Yes - Cadence mesurement_Magnet: Yes - Di2 connectivity wireless_ANT+ _Bicycle power: Yes - Di2 connectivity wireless_Bluetooth® LE_Cycling power: Yes - Di2 connectivity wireless_Bluetooth® LE custom (1)_Compatible with E-TUBE PROJECT: Yes - Di2 connectivity wireless_Bluetooth® LE custom (1)_Compatible with E-TUBE RIDE: Yes - Force measurement_Left side: Yes - Force measurement_Number of strain sensor: 24 - Force measurement_Right side: Yes - LED for system status: Yes - Number of control button: 1 - Zero offset_By control button: Yes - Zero offset_By device: Yes Technology: 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 Crank Arm: - Hollow forged crank arms - A lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. - The challenge is to reduce the weight of the crank without reducing its strength and rigidity. - SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. - Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight. 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. The HOLLOWTECH II crankset has been developed by pursuing the optimum balance of stiffness & rotating performance in a lightweight and beautiful crankset design. High Precision Sealing - Moreover, HOLLOWTECH II crankset has a high-precision sealing in the bearing area to increase durability maintaining the excellent rotating performance for long periods.