Getting Started; Measuring Wheel Size - Polar Electro CS600X User Manual

ENGLISH

3. GETTING STARTED

For video tutorials, go to http://www.polar.com/en/support/video_tutorials
Before activating your cycling computer, measure the wheel size of your bicycle.

Measuring Wheel Size

Wheel size settings are a prerequisite for correct cycling information. There are two ways of determining
the wheel size of your bike:
Method 1
Look for the diameter in inches or in ETRTO printed on the wheel. Match it to the wheel size in
millimeters in the right column of the chart.
ETRTO
25-559
23-571
35-559
37-622
47-559
20-622
52-559
23-622
25-622
28-622
32-622
42-622
47-622
55-622
55-584
Wheel sizes on the chart are advisory as wheel size depends on the wheel type and air pressure.
Method 2
Measure the wheel manually for the most accurate result.
Use the valve to mark the point where the wheel touches the ground. Draw a line on the ground 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. Enter this value in
the cycling computer.
8 Getting Started
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
29 x 2.2
27.5 x 2.2
Wheel size setting (mm)
1884
1909
1947
1958
2022
2051
2054
2070
2080
2101
2126
2189
2220
2282
2124