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35B 34
METHOD 2.
Mark the tread of the front tire with a line and roll the tire perpendicular
to the ground. You can also use the valve as a mark. Mark a line on the
ground. Move your bike on a flat surface straight ahead for one complete
wheel rotation. Check that the tire is perpendicular to the ground. Draw
another line on the ground exactly where the mark on the front tire
touches the ground.
Measure the distance between the two lines on the ground. _________ mm
Substract 4 mm to account for your weight on the bike to
get your wheel circumference. - 4 mm
This is the value you must set on the meter. _________ mm
The wheel size is always indicated in millimeters as this is more accurate.
Resetting the monitor enters the default values.
Adjusting the Wheel Size (Wheel)
If you start from Time of Day display, repeat steps 1-5.
6. Start with the display showing Wheel.
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 in inches
printed on it. On the chart below, find your wheel diameter in inches or in
ERTRO reading. Match it to the wheel size in millimetres on the right.
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
S510 S520 manual USA GBR A.pm6 7/2/02, 12:5934-35