Head To Head: Power Trainers

  • By Aaron Hersh
  • Published Feb 27, 2012
  • Updated Oct 31, 2014 at 4:37 PM UTC
Photo: Nils Nilsen

Power Measurement

CycleOps: The PowerBeam has strain gauges—ultra-sensitive measurement devices used to read power— integrated into the resistance unit to measure effort. It can also be preset to dictate power levels for a workout. CycleOps reports accuracy of +/-5 percent, twice the margin of error of its road power meters.

LeMond: Instead of using strain gauges to directly measure power, the Revolution’s Power Pilot accessory measures the speed of the resistance fan and barometric pressure to calculate power. In addition to wattage, Power Pilot also records speed, heart rate and cadence.

RELATED: How Watt-based Training Can Improve Your Cycling

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Aaron Hersh

Aaron Hersh

Aaron Hersh is the Senior Tech Editor of Triathlete magazine. To submit a question, write Aaron at

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