I currently own a 2005 Ford Focus ZX3 SES and bought it brand new. All maintenance has been kept up on in this vehicle since I've owned it. I have recently started to notice that the back end of the car seems to have a very loud and annoying road noise. The tire dealer said that the tires on my car were "cupped" and needed to be replaced. I spent $ to replace the tires and the car is still making the same noise. The noise gets louder the faster I go and I have noticed that when I make a right hand turn at a decent speed the noise goes away until I straighten the car out again then the noise comes back. Someone please give me some advice to what is going on. I'm sick of replacing tires on my car. Thanks!