i recently had a four wheel alignment, but no tire rotation, and have noticed that the outside of the front passenger tire (exposed side of the tire) is damn near worn bald. this is the only tire that has any signs of bad wear. any suggestions as to what this could be? i put the car in the ditch over the past winter and had to replace front bumper, lower air dam, and both wheel wells. had an alignment done then also, but they did not state any other problems. any help would be appreciated.