CycleOps PowerTap PowerCal + Speed Sensor
The draw: Heart rate upgraded
CycleOps, a longtime player in power meters, offers the least expensive option to capture and display a measure of effort vaguely related to power. PowerCal is a program contained in a heart rate strap that, unlike direct force power meters, uses changes in heart rate to estimate power output. It is easily paired with any ANT+ power meter head unit and no calibration is required. PowerCal’s data are most useful when reviewing and analyzing general trends in longer duration efforts, as it lacks the accuracy of a direct force power meter or ability to provide quick readings.