Maybe it's just the brakes dragging a little in that spot. If not, then I don't know.So I changed the axle. Wasn't too hard to do. However, the tube on the left side was not centered around the axle when I put it back on. To get the hub back on, I loosened the bolts on the tube, placed the hub, and then tightened up the bolts. The wobble is gone, but I notice when I turn the rear wheels by hand, there is one part of the rotation where it feels a little tougher to turn. What have I done wrong?