Calibrate Cateye cc-mc100w for 650cc x23 tire

[glenna1984]

I need to set a Cateye wireless cc-mc100w for a 650cc x 23 tire.

The cateye manual does not list this option.

Would anyone know what the setting is or know how to configure this by rolling the wheel one revolution and doing some math?

Thanks,
Glenn

 

[gclark8]

Glen,

What are the 26" and 650c options?

I just measured my 23mm GP4000, one revolution is 1950mm. Giving a diameter of 620mm.

 

[glenna1984]

Glen,

What are the 26" and 650c options?

I just measured my 23mm GP4000, one revolution is 1950mm. Giving a diameter of 620mm.

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I do not see those options in the manaul.
Here is the link http://www.cateye.com/en/pdfs/MC100Wv2ENG.pdf.

However, I think you just answered the second part of my question...
If I get the mm traveled in one revolution, is that what I set the cyclometer for?

 

[supergrill]

********************
I do not see those options in the manaul.
Here is the link http://www.cateye.com/en/pdfs/MC100Wv2ENG.pdf.

However, I think you just answered the second part of my question...
If I get the mm traveled in one revolution, is that what I set the cyclometer for?

It's a good starting point. Best to put your full weight on the bike at your desired inflation, if you have a bud to steady you. I am fortunate to have some straight run DOT exact-measured miles on a couple of routes that I usually use to tweak it slightly after the fact.

Note: that chart does list 23-571 which is the ETRTO designation for a 23x650C (1913 L(mm)), but each model tire and presssure/rider weight will alter the figure slightly.

 

[glenna1984]

It's a good starting point. Best to put your full weight on the bike at your desired inflation, if you have a bud to steady you. I am fortunate to have some straight run DOT exact-measured miles on a couple of routes that I usually use to tweak it slightly after the fact.

Note: that chart does list 23-571 which is the ETRTO designation for a 23x650C (1913 L(mm)), but each model tire and presssure/rider weight will alter the figure slightly.

Thanks.

 

[Albert 50]

Do your own measuring, the "charts" can be off, they do not usually allow for rider weight & different brands of tyres can vary. Among other reasons, I can tell when my tires need air by comparing odometer reading variation over set rides I do. Of cause if you use high pressure unweighted circumferences for calibration then that is one way to fudge your readings up.[very slightly] http://www.cyclingforums.com/t342680.html