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.....
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.
Raleigh20 PugFixie, Merc
yeah - use the valve as your start/end and then roll it one revolution in a straight line; Like a surveyor's trundle-wheel.