What initially got me to replace a couple tires and resultant 2 wheels my car drives smooth and accelerates and drives straight. But around 35-40 MPH when not accelerating, there seems to be different road noise to the car. My first instinct is the FR710 tires on the car. The 2 new ones(T rated) are on the back and 2 existing S rated 710s are on the front. I am not sure how "old" the old ones are but the tire dealer recommended not replacing but only the back ones since I was replacing a Yokohama Avid Ascent tire on the back. SO I am not sure if the front tires are just at a point to cause road noise but the tire dealer said they should not be replaced but I had the bent wheels. So I replaced the wheels only after he more or less refused to replace the front ones to see if that was causing the noise. He said the noise is coming from the wheels and not the tires. I tend to not agree and am going to rotate them today to see if the noise changes. before I just buy new tires?