I convert old Ten Speeds to Single Speed design and/or bikes with a more upright seating position. Gaining a more upright position will mean raising the handlebars to match the saddle position.



You will have to raise the steering stem but no more than its maximum height (usually marked with a min insertion line). If that is still not enough, get a steering stem extender and install it. Chances are this will necessitate longer brake and transmission cables.

Hope this is a help.