Just replaced a trailer tire that wouldn't hold air although it had very little tread wear.  Turns out that tires have a mfg. date stamped on them. Checked the date on the new tire and it was 2314, meaning the 23rd week of 2014.  It was already two years old just sitting on the shelf.  The staff at the shop were very helpful, called around to several other places to find a newer one, they were all 2 years old already but he finally found one dated 2415, a year newer
My old tire was from 2002 although I had had purchased it in 2007 w/o knowing they were dated.
Given that trailer tire treads don't usually wear out and it's the age of the tire that determines its life, it behooves the customer to check on the date of the "new" tires they purchase.  Valuable lesson here.

 

I found that out last year when my almost new looking trailer tires popped. Blew two in about a month. Learned my lesson that no matter how good they look, you've got to check the date to be sure. 

Not just trailer tires.  Can be important when looking at used vehicles...or used tires.

3 hours ago, Tucson said:

Just replaced a trailer tire that wouldn't hold air although it had very little tread wear.  Turns out that tires have a mfg. date stamped on them. Checked the date on the new tire and it was 2314, meaning the 23rd week of 2014.  It was already two years old just sitting on the shelf.  The staff at the shop were very helpful, called around to several other places to find a newer one, they were all 2 years old already but he finally found one dated 2415, a year newer
My old tire was from 2002 although I had had purchased it in 2007 w/o knowing they were dated.
Given that trailer tire treads don't usually wear out and it's the age of the tire that determines its life, it behooves the customer to check on the date of the "new" tires they purchase.  Valuable lesson here.

 

That might apply to singe axle trailers.  I had a new Z-7 with a single axle trailer and I put several thousand miles on it with hardly a sign of tire wear.

My Z-8 which was also new had a tandem axle trailer and wore those tire out in three years, doing the same amount of traveling.  Every time you make a turn, in either direction, forward or backward, you scrub the contact patch of the tire.  I could spin my single axle trailer in a circle by hand.  The tandem axle trailer?  Forget about it.  You push the tongue sideways, release, and it will return to where it was. 

And if there is an alignment problem with a tandem axle it amplifies the wear.