The tire Goodyear LT275/65R20 are the original tires on the truck when purchased. The tires have been rotated and balanced at the dealership routinely, approximately 42,000 miles on the set. On [XXX], I was travelling [XXX] here in NC when I felt a bump as if I had hit something in the road. I pulled off to the shoulder to inspect for damage or a flat tire. The left rear tire had completely lost its tread, only the steel belts were showing. Thus caused significant damage to the fender and tailgate of the truck. The tire remained inflated. Another driver pulled over in front of me and stated that the separated part had damaged his car. The NC State patrol was called and a report made for insurance. No one was injured to my knowledge. I changed the tire and was able to complete my trip. This could have caused a serious problem with a very serious accident. Fortunately, no one was injured. There were no warning that this might happen. I have sent pictures of the damage to my truck to the insurance company. This makes me very uneasy about these tires, I may need to purchase an entirely new set of tires from another manufacturer. I am not sure Goodyear is a decent brand of tire. The police report number is [XXX]. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)