Giant xtc se stem

8673sharp
8673sharp Posts: 28
edited January 2009 in MTB workshop & tech
I am looking to change the stem on my girlfriends xtc, what I need to know before I order a newer sit up and beg style stem is does anyone know off hand what diameter I need to buy, either 25.4 or 31.8. I am not at home to measure it, but want to order it before I get home. Thanks