Tires: Manuf. date of tires

Question

IMG1717  

IMG1718   Date code for 3 Goodyear Speedway Wide-Tread NF Nylon F70-14 tires, DOT #: KSO1123, KSO1156 & KSO1513.I believe that these tires were on my new 1967 Mustang GT when I took delivery on June 28, 1967?
Also date code for a set of F70-14 Goodyear Custom Wide Tread Polyglas tires I purchased on 6-8-1970, DOT # AKNBL8DP on all 4 tires.
See images;
Thank you
John

Answer
John,

The format for the DOT code was set in the late 1960's.  So the original tires on your Mustang would NOT have the current DOT coding.  They would have codes unique to the manufacturer - and every manufacturer was different.  I do not know what Goodyear's were in that timeframe, but the coding you gave me for the Speedway tires is unfamiliar.

However, the Polyglas is familiar - except it is missing the date code, which will be in a 3 number format (week/week/year) following the letters.

- BUT -

It is in the wrong position.  That series of digits ought to follow the letters "DOT" and they don't!  Further, the first 2 digits are supposed to be the plant and AK = Uniroyal - which doesn't make sense.  I suspect that series of digits is NOT the DOT code.