Dot dating tires
Try the Solideal website at I saw on the news recently the concern that a tire older than 5 years can be dangerous due to the deterioration of the rubber.
It advised people to check the DOT code on their tires to confirm the age.
Severe Service Emblem – Also known as the ‘Mountain Snowflake Symbol’ because, well, it’s a picture of a snowflake superimposed on a mountain, this emblem indicates that the tire meets US and Canadian winter traction standards.
I own a 2000 Chev Silverado 1500 Z71 4x4 with 11302 original miles. If your tires have been stored away from heat and UV sources they may still be in very good condition.
The more plies, the higher the load the tire can take.
Also indicated are the materials used in the tire; steel, nylon, polyester, etc.
Most products are usually made with a margin of safety built in so that when any standard is published, the product will be designed to exceed that limit by a factor of 1.5 or more. I have been told by Discount Tire, Big O, Les Swab, local independents that normal usage on this tire should NOT exceed 6 years. Some of what they've reported is correct, but I feel they haven't given viewers all the story about things which can cause tire failure to help make informed decisions. Editorial Comment: There has been a lot of TV news making a lot of noise about the dangers of "old" tires.The next four numbers indicate the date the tire was built, i.e., the number 1210 indicates that the tire was manufactured in the 12th week of 2010.These are the most important numbers in the TIN, as they are what the NHTSA uses to identify tires under recall for consumers.
TG Editorial Comment: Only tires which are used on public highways are regulated with DOT codes which have a standard way of showing their manufacture date.