I just had new Michelin tires installed last week. The date code was 4414-4614, which makes the tires produced in November. I thought this was acceptable and agree with you six months probably was going to be my cut off date. I used the fmca tire program and the discount was significant. For 235/80r 22.5 xrv regular price was $465, with discount they were $399. I started this process back in September and was told there was a backlog for this tire, so I think you have to weigh into the factor of the availability of your size tire. So I felt fortunate to get it done before our upcoming spring trip. I also took one of the best inner dually tires to have as an unmounted spare.
