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(Fig. 4)
o
Setting the wheel circumference
(1) How to measure wheel circumference
Measure the radius R (cm) with the rider on the bicycle as shown in Fig. 4, and calculate the wheel circumference
L (cm) using the following formula:
L = 2nR = 6.283 R (cm)
Or, paint a mark on the ground contact surface of the wheel, and directly obtain the wheel circumference by
measuring the distance between the marks printed on the ground.
* Table 1 shows R (cm), L (cm) and wheel diameter (inch).
(2) Setting the wheel circumference
216 (standard wheel circumference (cm) for 27" wheel) is displayed as shown in Fig. 2. When using 216 without
revision, press the mode button, and (ODO) will be displayed, and 216 is set. To revise 216, press the start/stop
button when the wheel circumference is initially displayed, and 216 will be changed to a flickering 217. Then, the
number will increase by 1 every time the start/stop button is pressed.
When the button is held down, it will rapidly increase.
Select a number in the range of 130 to 229, according to your bicycle. When the desired number appears, press
the mode button. When (ODO) appears, preparation is completed.
(3) Resetting or changing the wheel circumference
Get the stop state in tne (ODO) mode, and press the mode button and the select button simultaneously. The
wheel circumference number stored will flicker on the lower line of the display. Revise the number as required
according to the instructions given in (2).
* The stored wheel circumference number is only displayed while the mode and start/stop buttons are
simultaneously pressed in the (ODO) mode during operation.
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