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Product Description Elevate your road cycling experience with the Shimano Ultergra Powermeter FC-R8100-P Hollowtech II crank with a dual-sided power meter, designed for the enthusiast who demands precision and reliability. This high-performance crankset is fully equipped with ANT+ and Bluetooth connectivity, allowing seamless integration with your favorite cycling devices and apps. Crafted from durable aluminum with a steel axle, it promises longevity and resilience on the toughest rides. Its compatibility with Shimano HG 12-speed chains ensures smooth and efficient power transfer. The power meter excels in accuracy, boasting a measurement precision of 1.5%, and provides comprehensive cycling metrics including left/right power balance, cadence, pedal smoothness, and torque effectiveness. These insights allow for detailed analysis of your performance and areas for improvement. With a generous operating time of approximately 200 hours on a single charge of its lithium rechargeable battery, it's ready for long training sessions or endurance rides without frequent recharging. The crankset's design features a Q-Factor of 148 mm and is suitable for housing widths of 68 mm and 70 mm, ensuring a comfortable and efficient pedaling position. Whether you're training for your next race or simply looking to enhance your cycling performance, this crank with a dual-sided power meter is the perfect upgrade to your road bike. Information regarding the return of batteries and electrical equipment: Information on the return and disposal of used batteries and electrical equipment can be found here. For information regarding the return of used e-bike batteries, please contact our customer service. Product Specifications: Mounting:110 mm4-Arm asymmetrical Application:Road Version:Crank with power meter (dual-sided) Housing Width:68 mm, 70 mm Crank Compatibility:1x12-speed anthracite | 172.5 mm 36-52 | 172,5 mm | 36-52: Crank Arm Length:172,5 mm dropdown:172.5 mm 36-52 anthracite | 172.5 mm 34-50 | 172,5 mm | 34-50: Crank Arm Length:172,5 mm dropdown:172.5 mm 34-50 anthracite | 175.0 mm 34-50 | 175,0 mm | 34-50: dropdown:175.0 mm 34-50 Crank Arm Length:175,0 mm anthracite | 175.0 mm 36-50 | 175,0 mm | 36-52: dropdown:175.0 mm 36-50 Crank Arm Length:175,0 mm anthracite | 170.0 mm 34-50 | 170,0 mm | 34-50: dropdown:170.0 mm 34-50 Crank Arm Length:170,0 mm anthracite | 170.0 mm 36-52 | 170,0 mm | 36-52: dropdown:170.0 mm 36-52 Crank Arm Length:170,0 mm Technical Information: Chainline:44,5 mm Chain Recommended:Shimano HG 12-speed Operating time:approx. 200 hours Crank Arm Material:Aluminium Protocols:ANT+, Bluetooth Measured values:Pedal smoothness, Left / right power balance, Cadence, Torque effectiveness Q-Factor:148 mm Power source:Rechargeable battery Axle Material:Steel Measurement point:Crank arm Measurement accuracy:1.5% anthracite | 172.5 mm 36-52 | 172,5 mm | 36-52: Chainring Material:Aluminium Gear Ratio Crank:36-52 anthracite | 172.5 mm 34-50 | 172,5 mm | 34-50: Chainring Material:Aluminium Gear Ratio Crank:34-50 anthracite | 175.0 mm 34-50 | 175,0 mm | 34-50: Chainring Material:Aluminium Gear Ratio Crank:34-50 anthracite | 175.0 mm 36-50 | 175,0 mm | 36-52: Chainring Material:Aluminium Gear Ratio Crank:36-52 anthracite | 170.0 mm 34-50 | 170,0 mm | 34-50: Chainring Material:Aluminium Gear Ratio Crank:34-50 anthracite | 170.0 mm 36-52 | 170,0 mm | 36-52: Chainring Material:Aluminium Gear Ratio Crank:36-52 Product Features: High-precision dual-sided crank power meter for road cycling, compatible with Shimano HG 12-speed chains.Supports both ANT+ and Bluetooth protocols for seamless connectivity with cycling computers and smart devices.Measures left/right power balance, cadence, pedal smoothness, and torque effectiveness for comprehensive performance analysis.Constructed from durable aluminium crank arms and a steel axle, ensuring longevity and reliability on the road.Features a rechargeable lithium battery with an impressive operating time of approximately 200 hours.Designed with a Q-Factor of 148 mm and compatible with housing widths of 68 mm and 70 mm for a wide range of road bikes. Manufacturer Number: anthracite | 172.5 mm 36-52 | 172,5 mm | 36-52: IFCR8100PDX26D anthracite | 172.5 mm 34-50 | 172,5 mm | 34-50: IFCR8100PDX04D anthracite | 175.0 mm 34-50 | 175,0 mm | 34-50: IFCR8100PEX04F anthracite | 175.0 mm 36-50 | 175,0 mm | 36-52: IFCR8100PEX26F anthracite | 170.0 mm 34-50 | 170,0 mm | 34-50: IFCR8100PCX04F anthracite | 170.0 mm 36-52 | 170,0 mm | 36-52: IFCR8100PCX26F Contents: - 1 x Power Meter Crankset Shimano Ultegra FC-R8100-P Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com