On One Pompino owners...

They have got a big headtube too. So you'll be fine.

not really. I find the pomps headtube quite short for the size.
edit: from the website, I know it's not specific for the pomps.

Our frames have quite a short headtube.
Couple of things here - if you like HIGH bars (and by that I mean at, or higher than saddle height), you're going to need a higher rise stem than on other bikes. If your fashion tendencies are offended by pointy up stems, then stop right now and go choose another brand. Using a short headtube means we stress the top tubes of our frames in a certain way that gives a very compliant ride. Short headtubes mean that the top tube is low, so you won't catch yourself when you come off. We like it.