So i know my bottom bracket should be fine because its brand spankin new. The cranks however, are older. I'm experiencing some slight ... a venture to say.. bump while pedaling. its hard to explain, but when i pedal to just ride, everytime my pedals get close to parallel with the ground the kinda jump a little bit. I can feel it through the balls of my feet. I had problems with my carnks comming lose, and it seemed to fix the problem when i'd tighten them, but now, even after gettin them nice and tight, i'm still experiencing it.. are my cranks messed up forever?... let me know what you think.. i'm riding on a lx spline bb, with lx hollowtech cranks. thanks.