Every rod (well modern ones anyway) have a spline that is formed when it was made. It is extremely important that the line follow the spline for strength and agility (action). By putting a baitcaster reel on a spinning rod, the line is now on the wrong side of the spline.A buddy asked me if you are able to put a baitcaster on a spinning pole. He has one that still has all the packing on it from the store. I told em I wasn't sure. Experts?