I had 4 new Kumho K17's put on today and when I was driving home I noticed the occassional woomph sound coming from the rear when driving straight and sometimes when slowing down. I found it difficult to trigger almost sounded like rubbing. Also when I turn sharply I get a squeak coming from the back. I didn't get these noises before the tyre change. The tyres are exact same dimensions as the P6000's I had on before. What could it be? I think I need a tyre alignment as the car pulls to the left quite a bit and the back tyres seem to aim towards the middle of the car. Could this be the culprit?