Just took the car to the dealer for its 30K checkup and had a rotation/balance performed; 2 of the 4 had there weights shuffled (one by 35 degrees). My question is, just how much can someone expect a tires balance to change over time given that the wear patterns are pretty much uniform?
I don't know whether its me, but it doesn't feel as smooth (it was the fronts).. Could the balancer be out of calibration, etc?

 

doesn't feel as smooth? I've never had that happen to me, everytime I get my tires rebalanced it comes out a lot smoother.