Tire Age
NOTE: tires should not be older than 6 years. Not even the spare wheel.
The age of the tire can be determined via the manufacturer's code, which is listed behind the DOT code on the tire sidewall. The date of manufacture (the last four digits) is located at the end of the code.
Example
DOT DM CP 05 Y 2200 22 = production week
00 = production year 2000