Vehicle category: light trucks.system: tires; cooper discoverer radial LT; size 31 x 10.50r15.consequences of defect: tires may lose air rapidly and loss of vehicle controland an accident may result.note: defect may be indicated by a bulge in the shoulder and tread area. Thecondition may cause vibration when tire IS in use. Maintain proper inflationand avoid driving at highway speeds until tires are replaced.dot ID number: ut60clk363, ut60clk373, ut60clk383, ut60blh353, ut60blh363,ut60blh373, ut60blh383.