My car sounds like a helicopter crusing down the highway. Have about 16k on the stock Conti's and rotated them for the first time at about 14k. Sort of hard to describe except that the tires sound like a helicopter if you can imagine that. Ideas on what it could be? Should I push Toyota for some new rubber? I actually plan on getting some GY Comforttreds put on in the next few weeks as I really dislike the ride with the OEM Conti's but free is free Bad belt in tire maybe??