All the bikes I've owned have had quill stems. My wife is considering getting this new bike:



and I know that she will want to have the handlebars at about the same height as the saddle. I know nothing about threadless stems. Would I have trouble raising it several inches?

Also, concerning terminology: Which is called the "stem" on a threadless system, the part that goes in the steerer tube, the part that clamps onto the handlebars, or both??

Thanks,

Al