Vehicle category: passenger vehicles.system: tires; weather master radial and atlas radial sno ht, size lr78x15.consequences of defect: if this condition exists, loss of air may result inloss of steering control, and a vehicle accident with possible personal injury.note: the defect may be indicated by a bulge in the shoulder and tread area.this condition will cause a thumping vibration when the tire IS in use.dot ID numbers: utv4ca9488, utv4adk2488, utv4adk3488 and utv4adk4488.