Programming (Setting Up) Your Wheelsize; How Is The Wheelsize Precisely Determined? - VDO Cyclecomputing C05 Instruction Manual

5.1 Programming (setting up) your wheelsize

In order for the VDO CYTEC C 05 to indicate your actual speed and your trip distance, the correct wheelsize
GB
has to be entered. Wheelsize is the outer circumference of the wheel including the tire.
following default is entered wheelsize = WS = 2124 mm
Watch out: Above default is automatically applied after a battery change. After a battery change, the correct
wheelsize for your bike has to be reentered, should you want to have accurate speed displayed,
according to your bike's wheelsize.

5.2 How is the wheelsize precisely determined??

Place the front wheel of your bike with the valve at the bottom, mark this position with a line and push your
bike ahead until exactly one rotation of the front wheel is completed. Draw another line where the valve now
is. Take a ruler and measure the distance between marks 1 and 2 which reflects the
wheelsize = wheel-circumference. The figure measured (in mm) is the wheelsize
to be entered into your computer.
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