Take the measurement of the new bars (width+pullback) and add the height of the new risers, then measure the old bars (width+pullback) and add the height of the old risers and see where that gets you for a numerical value and that will tell the tale on the cables.

A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort. Herm Albright (1876 - 1944)