Goodyear Polyglass-----is there a date code?

[George W.]

I have a Goodyear Polyglass GT G60 15 that appears to be near new. Is there anyway to determine what year this tire was produced? Thanks, G.

[Jack H.]

Re: Goodyear Polyglass-----is there a date code?

After 1968, tires were required to have DOT source code info embossed into the sidewall. For the first several years, the code/sequence was mfgr proprietary, but staring in 1971, the sequence was standardized into a 10-digit code with the last three digits representing month/year of mfgr. When the century rolled, the sequence was extended to 11-digits with the last four indicating month/year.