HELP ,,will this stem fit?

mikeouk
mikeouk Posts: 148
edited May 2013 in Workshop
Need to buy a shorter stem for my girlfriends bike but im not sure on the diameter I need and the bike is not with me to measure it. im assuming handlebar diameter and fork steerer are pretty much standard on most road bikes?

her bike is decathlon sport 1, road bike (predessor to the triban3)

will this stem fit ? http://www.chainreactioncycles.com/Models.aspx?ModelID=84208