If you own a vehicle it is evident that you check the tire date code for the purpose of warranty. These codes are located on the surface of the tire which provides the month and the year in which the tire was manufactured. This is however the date in which the tire was manufactured and not the date of installation.
The tires that were used before the year 2000 would appear like 164. This depicted the number as the 16th week of the year 1994. After 200 this system was changed and the four number codes were 295 which meant the 29 week of the year 2005.
These numbers are usually printed on an oval shape which contains the alphabets DOT for the Department of Transportation. These code numbers can be seen only on one side of the tire. If this is not visible, then chances are that the tire was installed on the opposite direction. There is also a possibility that the tires in a store may depict different DOT contents. This is because the tires may be purchased at different times by the store itself.
However, if the DOT on a particular tire does not depict the proper sequence of numbers then the tire date code may not be valid. Most vehicle owners chance their tires often so that they comply with the normal standards of the numbering as per the DOT. In fact, the date code is also an indication of the age of the tire. The older the tire more is the chance of deterioration of the rubber quality over time. This is primarily because these are exposed to heat, oxygen, coarse surfaces, water and other such aspects which lower the quality of performance.
Over the years, the tire date code has grown in complexity as is evident from a mix of metric and imperial units, lettering to numbering schemes. At present, the new automobile tires have ratings from traction, tread wear and temperature resistance. The tire date code specifies the dimensions of the tire, some of its key limitations like load bearing capacity and maximum speed.