I measured my seat post from the center of the post to the center of the seat mount and it measures 10 mm. But what is the standard for measuring setback. I think that I need more setback so I need more information before I try to get a new seat post.

Center line of the seat post tube on the front end , the back is how far the clamp is behind that Line.

IDK if the International standard is the center or the front , or if there is an agreed upon standard at all.

But then you have the added question of how far the saddle rails, of your saddle,
allows you to shove the saddle back .. that, of course, is not a seat post spec.

Setback is measured by taking the measurement from the center of the seatpost to the center of the seatpost clamp

The problem is that you really can't compare stated setbacks. The measurement that matters is from some reference point (the center line of the post works) back to the front edge of the seat clamp, because that determines how far back you can push the saddle. But as has been stated the usual setback is from the center line of the post to the center of the clamp. The actual clamp size can vary quite a bit between various makers, so the measurement to the center is really meaningless for comparison purposes.

Thanks. You guys have made some very good points. Most manufactures don't give out all the specifications so I guess that I will have to look at pictures and try to get a good workable seat post and clamp.

You can look up whether ISO has a standard on seatposts, if there's a separate one that's been released, at www.iso.ch.

You say this as if it's a standard. Is it?

If you mean standard in terms of a professional, widely accepted organization that sets standards such as National Institute of Standards and Technology, setting a standard for this, I haven't a clue.

However, given seatposts are not all the same size (think aero posts), I can't see another way to do it with any consistency. Additionally, when I've completed forms for custom built bikes, or forms to record your current setup, it's been measured this way.

When looking for more, Thompson makes a "bent" or angled tube seatpost that will give you 16mm. Crank Bros. make one at 20. I believe I've seen some as far back as 25 but those tend to be more expensive aero posts for TT bikes.

Posts with 20mm+ setback are pretty readily available, I think? FSA's (alloy and carbon) come in 0, 20, 25 -- even 32; Ritchey uses 25 as a standard at various price points.

I think Titec Hellbent makes one that has 38mm of setback.

The general industry standard is from the center of the post to the center of the clamp. If you look at the QBP catalog, this is how they measure/list all their posts' setback. Unfortunately, it doesn't take into account the size of the clamp itself. A very long clamp (measured front-to-back), for example, would reduce the effective setback.

Ok, so that's kind of a de facto standard.