E.17
stem is at its bottom-most position.
2. Mark the ground directly under the valve
stem with chalk or a piece of tape (Fig. 23).
3. Roll the bicycle forward in a straight line
until the wheel has completed one revolution and
the valve stem is again at its bottom-most posi-
tion. Make another mark, as before.
4. Measure the distance between the two
marks. Record your measurement in mm_________.
This is your wheel calibration setting.
Note: 1 inch = 25.4mm
Calibrate the computer with Custom Wheel size
5. Follow “Set Wheel Size” on page 11 until
CUSTOM appears in the menu.
6. Hold <Set> until the 4 digit wheel setting is
displayed with the rst digit ashing.
7. Press <Mode> to scroll the ashing digit.
8. Press <Set> to select a number and
advance to the next digit.
9. Repeat #2 and #3 to set each digit.
When <Set> is pressed after the last digit selection, the display
returns to the Mode menu.
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