Vehicle category: school buses.system: tires; transteel traction radial, sizes 10.00r20 and 8.25ro.consequences of defect: in continued use, rapid air loss could occur whichcould cause loss of vehicle control and an accident.note: a visible bulge in the tread area or an audible thumping noise undervehicle operation could signify tread separation.dot ID numbers: w12j8nb158 thru -198, w12d8ne158 thru -198.