Tires Manufactured Before 2000

• 1). Write down the last four digits of the tire identification number located on the sidewall.
  
  
• 2). Add the digits "20" before the last two digits. This is the year that the tire was manufactured. For example, if the four digits from Step 1 are "2308," the tire was manufactured in 2008.
  
  
• 3). Use the first two digits from Step 1 to determine the week of the year in which the tire was manufactured. To do this, simply use an online calendar for the year you calculated in Step 2 and count off the number of weeks specified by the two digits. For example, if the four digits are "2308," count off the weeks until you get to the twenty-third week of 2008.
  
  

Tires Manufactured Since 2000

• 1). Write down the last three digits of the tire identification number.
  
  
• 2). Add the digits "199" before the last digit. This is the year that the tire was manufactured. For example, if the three digits from Step 1 are "238," the tire was manufactured in 1998.
  
  
• 3). Use the first two digits from Step 1 to determine the week of the year in which the tire was manufactured. To do this, use an online calendar for the year you calculated in Step 2 and count off the number of weeks specified by the two digits. For example, if the three digits are "238," count off the weeks until you come to the twenty-third week of 1998.