Tl* the contact owns a 2010 kia rio equipped with hancook optimos tires, size p185/65/r14/85h. the contact stated that while driving various speeds, she noticed that the vehicle was bouncing abnormally. the vehicle was taken to the dealer where they advised her that the rear driver side tire was out of round and was unable to be balanced. the vehicle was not repaired. the manufacturer was contacted and they offered no assistance. the failure mileage was approximately 8,000.