Those bars are ridiculously wide for that size frame. They would typically be used on a much larger frame for a proportionately much larger person. I had the same problem with my 43cm Motobecane Messenger, which was supposed to be supplied with 40cm wide drop bars, but instead arrived with 46cm bars. They also sent a long 120mm stem instead of the specified 90mm stem. I think the factory just packs the bikes with whatever oddball parts they have available when they ship it. Anyways, my guess is that if you have typical proportions, you will want about a 40cm c-c wide bar.