Vehicle category: trucks.system: tires; custom flexsteel xg, size 9.50r16.5.consequences of defect: this condition could lead to premature tire failure,sudden loss of air, loss of vehicle control, and an accident.note: tire vibration IS an indication of separation.dot ID numbers: mmxlj7a355 thru mmxlj7a525, mmxlj7a016 thru mmxlja1346.