I noticed that my front rim has a slight smile. That is what I call a bend that is straight in, not lateral. You can't really notice the smile until you get the front end off the floor and spin the tire, then it becomes obvious. The smile is not large enough to feel when riding. It is obvious that something was hit, straight on, and caused the smile. Do you think this can be removed by smacking the rim with a rubber mallet? Should I loosen the spokes in the area first?