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 | Wheel size diameter (inches) | Wheel size setting (mm) |
---|---|---|
25-559 | 26 x 1.0 | 1884 |
23-571 | 650 x 23C | 1909 |
35-559 | 26 x 1.50 | 1947 |
37-622 | 700 x 35C | 1958 |
47-559 | 26 x 1.95 | 2022 |
20-622 | 700 x 20C | 2051 |
52-559 | 26 x 2.0 | 2054 |
23-622 | 700 x 23C | 2070 |
25-622 | 700 x 25C | 2080 |
28-622 | 700 x 28 | 2101 |
32-622 | 700 x 32C | 2126 |
42-622 | 700 x 40C | 2189 |
47-622 | 700 x 47C | 2220 |
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.
Before using your cycling computer for the first time, customize the basic settings. Enter as accurate data as possible to ensure correct feedback based on your performance.
To adjust the data, use
, and accept with . The values scroll faster if you press and hold or .To activate your cycling computer, press
twice. Once activated, it cannot be switched off!Welcome to Polar Cycling World! is displayed. Press .
Language: Select English, Deutsch, Español, Français or Italiano. Press
Start with bike settings is displayed. Press .
Number of bikes: Select 1 or 2 depending on how many bicycles you will be using. If you only use one bicycle, settings for bike 2 can be entered later. For further information, see Bike Settings.
Wheel: Enter the wheel size (mm) for each of your bicycles. For further information, see Measuring Wheel Size.
Start with basic settings is displayed. Press and adjust the following data:
Time: Select 12h or 24h. With 12h, select AM or PM. Enter the local time.
Date: Enter current date; dd = day, mm = month, yy = year. If you use imperial units, set the date; mm = month, dd = day, yy = year.
Units: Select metric (kg/cm/km) or imperial (lb/ft/mi) units.
Weight: Enter your weight. To change units, press and hold the .
Height: Enter your height. In LB/FT format, first enter feet then inches.
Birthday: Enter your date of birth; dd=day, mm=month, yy=year.
Sex: Select Male or Female.
Settings OK? is displayed. Select Yes or No. Select Yes to accept and save settings. The cycling computer will display time of day. Select No if settings are incorrect and need to be changed. Press to return to the data you want to change.
Use the Polar ProTrainer 5 software to enter all basic settings.