After years of development and collaboration with professional teams, Shimano introduces its first fully integrated power meter with the HollowTech II 12-speed Dura-Ace chainset, delivering exceptional accuracy and performance. Featuring precisely calibrated strain gauges within both left and right crank arms, this power meter provides stable and precise data measurements from both sides throughout each rotation, with an accuracy of +/-2%. The unit supports Bluetooth and ANT+ connectivity for wireless firmware updates and data acquisition, while the integrated rechargeable battery ensures reliable performance in all conditions. The hollow outer chainring design enhances rigidity and reduces weight, eliminating chainring flex and significantly improving shifting performance, even under high load. The industry-leading HollowTech II crank arms offer increased rigidity, reduced weight, and improved strength, while the specially designed teeth are optimized for 12-speed chains, ensuring better contact and power transfer. This chainset offers various chainring ratios and crank arm lengths, providing customization for all riders and disciplines. The HollowTech II integrated bottom bracket design features wider bearing placement and a larger axle diameter, enhancing stiffness and efficiency, while the advanced seal design ensures smooth rolling and increased durability.

• Integrated power meter with +/-2% accuracy for precise data measurement.
• Calibrated strain gauges in both left and right crank arms for stable performance.
• Bluetooth and ANT+ compatibility with wireless firmware updates and data acquisition.
• Rechargeable integrated battery with a fully waterproof electric system.
• Hollow outer chainring design for improved rigidity and reduced weight.
• Enhanced shifting performance even under high load with hollow chainring structure.
• Cold-forged HollowTech II crank arms for increased rigidity and reduced weight.
• 12-speed chain compatibility for better contact and improved power transfer.
• Wide range of chainring ratios and crank arm lengths available for customization.
• HollowTech II bottom bracket with increased stiffness and efficiency.
• Advanced bottom bracket seal design for smooth rolling and durability.