A balloon catheter is provided which may be used to dilate hardened regions of stenosis. The balloon catheter is provided with dilation wires that may be extended so that the dilation wires are disposed adjacent an outer surface of the balloon during dilation. Thus, as the balloon is expanded, the dilation wires are squeezed between the balloon and the stenosed region to crack or breakup the stenosis. The dilation wires may also be retracted away from the balloon. Thus, the stenosed region may be dilated with the balloon without using the dilation wires if desired.