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Detailed Description of Ride Metrics
Power
• Power is the energy per second that the rider produces. It is measured in watts just as on outdoor bike power
meters.
• Power can be displayed in up to 4 digits.
• Power is a direct measurement from the 4iii Powermeter.
• Schwinn validated the power accuracy using an in-house, calibrated dynamometer; margin of error is generally
±1.5%.
• Proper calibration of the power sensor is crucial to achieving a high level of accuracy.
• Schwinn does not validate the accuracy of the Echelon2G against commercial road bike power meters since all
power meters measure power differently. Therefore, it is possible that the power reported by the Echelon2G will
not match the power reported by commercial power meters for road bikes.
• Given the differences between outdoor and indoor bikes, and differences in riding conditions, it is common for
a rider to have a different power output on an indoor bike than on an outdoor bike.
• The accuracy of power output and consistency of power between bikes can be adjusted using a feature in the
CALIBRATION menu called POWER ADJUST.
• The POWER ADJUST feature can also be used in cases where a studio wants to match the reported power of the
Echelon2G to any specific outdoor power meter.
RPM
• RPM measures the rotations per minute of the crank arm and is transmitted from the 4iii Power Sensor
• There is no minimum RPM requirement for starting the ride timer.
Gear
• Expresses level of resistance. The gear number increases as the resistance knob is turned clockwise.
• Gears cover a range of POWER values.
• Gear display can be turned off in the settings menu if desired.
Calories (CAL)
• Calories on the Echelon2G are calculated directly from the power assuming the rider has an average fitness
level. Calories are a measure of energy expended while on the bike.
• The Echelon2G Calories do not take into account any biological factors such as age, weight, and gender.
• The Echelon2G Calories also do not take into account Calories burned due to a person’s normal metabolic rate.
• Heart rate monitors use heart rate, age, gender, and weight to estimate how many calories a person burns.
• Since there is not a direct correlation between heart rate and Caloric burn, heart rate monitors do not as accu-
rately estimate Caloric burn compared to the Echelon2G.
• Heart rate monitor manufacturers use their own algorithms to estimate heart rate, and so the Caloric burn will
vary from brand to brand. Heart rate monitors that measure heart rate at the wrist do not measure heart rate as
accurately or consistently as heart rate chest straps.
• Tests done using different heart rate monitors (i.e. MYZONE, Polar A360, Polar H7 and Garmin) have shown some
estimate Calories higher than the Echelon2G, and some estimated Calories lower than the Echelon2G.
• The CAL display can be turned OFF in the Service Menu if desired.
