I am running a set of old 170 campy GS cranks from the remainder bin at my LBS on my fixed (a converted road frame), and pedal strike has not been a problem. But I have noticed that there is a tight spot and a loose spot in my pedal revolutions, and I wonder if that has anything to do with using road rather than track cranks. I have not really tried to fix it, but it is a little annoying. Any ideas if it is the cranks, the BB or something else entirely?