I got my Pro-Urban risers. they are 25.4 my bullhorns are 26. i know the bars will fit into the stem, no worry there, but im sure the levers wont clamp onto the bar. i am capable of making a shim from a can or something, but is there a known "work-around" for this condition? i'd but new levers but the PITA of unstringing the brake cables does not sound fun every time i want to swap bars...