During a 10-minute commute to work, my right rear continental contitouring contact ch95 (grand touring all-season) 175/65hr15, purchased and installed on 6/29/06, failed. the tread portion separated from the tire sides. the sides remained attached to the wheel rim. the tread, minus the tire sides, separated from the wheel and was found otherwise intact on the roadside behind my disabled vehicle. no accident occurred and no damage or physical injuries were sustained. a call to the retailer (the dealership where the tires and car were purchased) resulted in a response suggesting that some road hazard contributed to the failure and that would not be considered coming under the tire warranty. upon seeing the failed tire, the nc state trooper and emergency roadside assistance technician disagreed, feeling that the tire might be defective. *jb