Groove depth is portrayed as millimeters on the tread on Nokian tires. New tires have a groove depth of over 8 millimeters, though often more than 9 millimeters.
While the law does not define tire life or stipulate manufacturing dates, tires can only be considered and sold as "new" if they were manufactured within the last five years. The recommended use/life of a tire is six years and the recommended maximum age is ten years.
The easiest way is to use a penny – place it in the main groove of the tread, in the center with Lincoln’s head upside down and facing you. If you can see all of Lincoln’s head, your tread depth is less than 2/32 and it is time to replace the tires.
Over time, the rubber compound in a tire’s tread becomes harder, especially when exposed to heat and sunlight.
It is important to "break in" new tires. The break in period is 300 miles (equivalent to a tank of gas), by avoiding quick acceleration, breaking and turning.
Used tires cannot be taken to a landfill; they must be disposed of at an appropriate recycling facility.
The manufacture date is located on the sidewall of the tire, displayed as a four-digit number; the first two are for the week and the last two for the year. For example “1117” means the tire was manufactured in week 11 of the year 2017. Note: It is more important to pay attention to the wear and con…
The recommended use of a tire is six years and the recommended maximum age is 10 years.