I have a Ciclosport cyclometer. I have 700 x 23 wheels. What is the standard setting? I guessed 2140 but it seems a bit off.

The overall OD's of tires change from brand to brand so to get the most accurate number do a rollout on the bike.

Put a chalk mark on the tire and on the ground at the same point. Push the bike forward until the tire mark is on the ground again and mark the ground. For greatest accuracy, It is best to do this while seated on the bike (have someone push you).

Measure the distance between the two marks in MM. It should be around 2100 mm or so. This is the number you put into the computer. If you only have an inch tape multipy inches x 25.4 to get mm.

I have a Ciclosport cyclometer. I have 700 x 23 wheels. What is the standard setting? I guessed 2140 but it seems a bit off.

This site http://www.cateye.com/en/pdfs/CL200v10_E.pdf

says 2096 for 700x23 but as previously mentioned, tire sizes can greatly vary and even all rims aren't the same.... Best to do the rollout test.

Once you've done the rollout test, then find a road where you can get mile posts that go for 10 miles or more. Compare your computer's odometer with the mile posts, and adjust the number appropriately (by % delta).

I have a Ciclosport cyclometer. I have 700 x 23 wheels. What is the standard setting? I guessed 2140 but it seems a bit off.
I have always found the published number for a 700x23 to be as close as I can measure with only one tire revolution. I just use the number in the book (Flight Deck manual says 2105mm). 28s, 32s, etc. seem to be more variable.

Now, I have a friend who does a role out over 10 revolutions. That would very likely be a good number to use.

TF