POLAR S720i - Manual (Page 37)

B 35
ERTRO Wheel size diameter (inches) Wheel size setting (mm)
30-559 26x1.25 1953
35-559 26x1.5 1985
44-559 26x1.75 2030
47-559 26x1.95 2050
26x1 1/8 Tubular 1970
650-20C 1952
622-20 700x20C 2086
622-23 700x23C 2096
622-25 700x25C 2105
700C Tubular 2130
28 (700 B) 2237
7. Press OK to start setting the wheel size.
8. Scroll up or down to adjust the wheel size. Press OK.
You have the following alternatives to find out
the wheel size of your bike:
METHOD 1.
Look at the wheel of your bike and find the wheel diameter printed on it.
On the chart below, find your wheel diameter in inches or in ERTRO
reading and match it to the wheel size in millimetres on the right.