One of my tires is almost bald on the outside and the rest is pretty good tread. I figured it needs to be aligned. I hit a tree stump about a year and a half ago and knocked the whole assembly forward. I took all apart and re-bolted everything but now thinking something is still wrong. The other tire is normal wear throughout. Any thoughts on what is wrong, where I should take it (live in Jeff City}, and approximate cost? Thanks in advance........