If thats the problem a "good" tire man would have noticed it, but how many "good" tire men are there left nowadays, just pay them for the tires and they stick'em on the rims for you. Hes right, it could very well be a seperated tread. Put the tires on a high speed tire balancer and watch (and feel?) the tire tread as it spins, look for a piece of the trie that "lifts" from the tire carcass (body of the tire)....<><.... :cry: