I realize that. jonathanb715 should have too. (That's why it's a petty criticism and one that which misses the point!)

If he had said something like "yes, and there are other things that make it even more complicated", that would have been reasonable.

Keep in mind that that reference was one I provided. I also hinted in an earlier post that things might be more complicated. But to go into those complications would not have done anything about understanding the basics.

so should i sit on the bike when i do the roll out or not?

Only if you will be sitting on the bike when you wish to measure the mileage it's traveled. Otherwise, no.

Do you care about a consistent error of being about 1% too high?

Gents,

So my roll out was 2116. The Sigma manual states 700x23 = 2133. I'm going with the roll out. Good choice?

The title isn't funny anymore.

Never thought it would get this unending but still looking for a simple answer.

Go with the roll out.

In 5 words too!

Thanks,

Yup, go with the roll out -- because the tire is always being compressed to that size while you're riding.

Post 4 indicated the answer (which is the one Sheldon Brown also recommends).

Post #15 was the well intended suggestion that resulted in 5 more pages of fun