Calibrate Cycling Power Sensor - Polar Electro Vantage M User Manual

Measure the wheel manually for the most accurate result.
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Use the valve to mark the point where the wheel touches the ground. Draw a line on the ground
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to mark that point. Move your bike forward on a flat surface for one complete rotation. The tire
should be perpendicular to the ground. Draw another line on the ground at the valve to mark a
full rotation. Measure the distance between the two lines.
Subtract 4 mm to account for your weight on the bike to get your wheel circumference.
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Method 2
Look for the diameter in inches or in ETRTO printed on the wheel. Match it to the wheel size in mil-
limeters in the right column of the chart.
ETRTO
25-559
23-571
35-559
37-622
52-559
20-622
52-559
23-622
25-622
28-622
32-622
42-622
47-622
Wheel sizes on the chart are advisory as wheel size depends on the wheel type and air pressure.

Calibrate cycling power sensor

You can calibrate the sensor in the pre-training mode. Choose one of the cycling sport profiles and wake
up the transmitters by rotating the cranks. Press LIGHT and follow the on-screen instructions to cal-
ibrate your sensor. For calibration instructions specific to your power sensor, see the manufacturer's
instructions.
Wheel size diameter (inches)
26 x 1.0
650 x 23C
26 x 1.50
700 x 35C
26 x 1.95
700 x 20C
26 x 2.0
700 x 23C
700 x 25C
700 x 28
700 x 32C
700 x 40C
700 x 47C
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Wheel size setting (mm)
1884
1909
1947
1958
2022
2051
2054
2070
2080
2101
2126
2189
2220