1995 Toyota Corolla Humming and Vibration

I have a 95 Toyota Corolla that has 163,000 miles on it. I had the tires replaced recently and then when I was going to rotate the tires I noticed that the front passenger side tire was on backwards and that they striped some of the wheel bolts. I took it back to firestone and they were more then happy to fix what they had screwed up. The problem now is that the front driver side tire makes a humming noise. I can feel it in the steering wheel and the pedals when I drive and noticed that it has no correlation with how fast the engine is going just how fast the tire is spinning. The humming changes pitches when I brake and stops completely when I turn to the right. I tried taking the tire and wheel off to see if there was anything obvious but after checking the ball joints, tie-rod end, and brake caliber I can find nothing loose or that doesn't seem to be working correctly. Any ideas?