I need the 4 digit code to program my ccm bike odometer on my road bike. can anyone help?
The four digit number is the circumfrence of your wheel.
There are two ways to find this number. You could find it by marking off the distance your wheel travels in one rotation and measuring it in milimeters or you could look it up based on the tire size. There should have been a chart in the instructions that accompanied the computer. If you no longer have them go to the website below look at the bottom of page 18.
Source(s):
http://www.velo-direct.ch/44_pdf/155011-...
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