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Tire Ratings and Tire Safety
Tire Class
The "P" indicates the tire is for passenger vehicles. If it started with “LT” then it would indicates the tire is for light trucks. Truck tires are constructed differently than passenger tires because of the jobs they are called on to do. A truck tire is designed to carry heavier loads than passenger cars so it is built stronger internally. That results in a tire that won’t flex as much and won’t give you as soft of a ride that a passenger tire will. You should be aware of this distinction when buying tires because a passenger tire on a truck or a truck tire on a car will perform quite differently which could result in tire failure at critical times.
U.S. DOT Tire Identification Number
This begins with the letters "DOT" and indicates that the tire meets all federal standards. The next two numbers or letters are the plant code where it was manufactured, and the last four numbers represent the week and year the tire was built. For example, the numbers 3197 means the 31st week of 1997. The other numbers are marketing codes used at the manufacturer's discretion. This information is used to contact consumers if a tire defect requires a recall.
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