172.5mm only.

Regardless of your level or experience on the bike, there is no better way to optimize your training and performance than with a power meter. Fortunately,Specialized has combined incredibly light and stiff S-Works carbon crank with a dual power meter to create the lightest (440 g / 172.5 mm) and most accurate power meter.

The double-sided S-Works Power Cranks use separate strain gage systems to measure the force generated by each leg individually. This will maximize the accuracy of the metrics and help you better understand your performance when fatigue builds and when you need to recover from an injury. And with industry-leading temperature compensation firmware and waterproof cases, Power Cranks are easy to use. Calibration is only required in the event of seasonal temperature fluctuations, and the key supplied makes changing batteries a breeze.

  • +/- 1.5% real accuracy, tested on the WinMill and validated by the Locomotion Lab in Boulder, CO.
  • Independent, dual performance measurement
  • Works with ANT + and Bluetooth® devices
  • Easy setup and diagnosis with the Specialized Power App. (iOS and Android versions available)
  • Hollow carbon crank arms, carbon spider and oversized aluminum spindles offer superior rigidity and lighter weight than the competition - 440 g for 172.5 mm crank arm length.
  • Suitable for Specialized racing bike frames with OSBB or PF30 bottom bracket cups, as well as most BB30 racing bike frames.
  • 110 BCD Carbon Spider (also compatible with 130 BCD Carbon Spider - sold separately).
  • Compatible with Shimano and SRAM drives. Chainrings are sold separately. Use only with Specialized / Praxis chainrings 06217-1702 (52 / 36T) and 06218-1713 (50 / 34T).

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