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A couple of weeks ago I posted some tire date code numbers and nobody here seemed to be able to make heads or tails of them. I determined, to the best of my ability, that the Dunlop K177 rear tire on my '98SE is original and that the tire was mfgd in the 32nd week of 1997. Here are the photos showing the date stamp, and tire in general (with 9200 miles on it). No sidewall cracking and the tread doesn't look terrible for the age and miles. There is some cupping and the rubber is MUCH harder than the new tire that will replace it. I'll feel lots safer with the new tire installed.
 

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I bought a 85 aspencade with 6000 miles and the tires had 400 miles on them cause I got the tire bill with the bike but they were 10 years old so I just bit the bullet and changed them also, better to be safe than sorry.
 

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That is not the date code. It should be a 3 digit # if before 2000 i.e. (327) if the 32nd week of 97.
 

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That is not the date code. It should be a 3 digit # if before 2000 i.e. (327) if the 32nd week of 97.
Well Dave, that's the ONLY stamp on the tire, period. The tire is required to have a date code...and looking at the tire closely it looks original (as was the front one)...so as far as I'm concerned, it's gotta be the date code. It makes sense that a 1998 model could have a tire made in 1997 and my research showed that some of the older date stamps contained more than the 3 digits representing the week/year, but that the last 3 were always the date. It seems that before 2000 the stamps were not quite as uniform as afterwards.

I'll be taking the wheel in tomorrow to have the new tire mounted and I'll ask the shop, but I don't know if they'll be able to shed any light on the issue.
 
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