Not sure how to read wheel codes. Near the stem are codes (small M50) then a 5 then the valve stem and then 9 HK. From what I have read today the M5 is the plant, 0 year 1980 ?, 5 is May and 9 is day. So May 9,1980 ??
Last edited by Doug Hopkins; 07-30-2014 at 07:01 AM.
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