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Old 03-01-06, 01:11 PM   #1
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35-406 tyre size for computer setting ?

I recently received my new NWT

Now I need to set my bike computer but the manual is useless, it only shows the setting for 47-406 tyres which is 1590.

What should the setting of a "Schwalbe Marathon slick 35-406 20X1,35" be ?
I guess the only way to have a accurate setting is the trial-and-error method on a known distance, 1km or more.....

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Old 03-01-06, 02:38 PM   #2
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The setting is probably just your wheel circumference in mm (1590 is about 20in*25.4mm/in*Pi). So, just roll it out next to a tape measure, and plug in the length of a revolution.
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Old 03-02-06, 08:45 AM   #3
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yeah - use the valve as your start/end and then roll it one revolution in a straight line; Like a surveyor's trundle-wheel.
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