How do you tell the age of a tire with serial # 31LL7842. It is a 4.75-5.00x18 Kelly Springfield Tire?

3 Answers

  • Dan B
    Lv 7
    1 month ago

    Can't tell from that serial number.  The date of manufacture is the last 4-digit  number at the end of the DOT code on the side wall.  The first two digits is the week of the year, the last two is the year. that the tire was manufactured.

    • jim1 month agoReport

      Thanks Dan. They changed the system in 2000 to the 4 number system. Prior to 2000 it is the type of serial that I am asking about. I googled it and can't make heads or tails out of the explanation.

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  • 2 months ago

    You should cut it in half and look at the rings and count them.  Oh, wait, that is for trees.  

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  • Anonymous
    2 months ago

    That tire was made March 1st.  LL = 2019

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