Tires: Old tires, cold climate, tire industry

Question
We bought an 1994 Four winds motor home recently. (25,9600 actual miles)  The tire tread looks very good, with 65 psi. in all six tires it rides quiet and smooth. Should I be worried about the age of the tires knowing the Motor home has not been used much in the last 3 years?

Answer
James,

Recent bulletins from the tire industry indicate that tires degrade simply due to time.  The age of a tire is important even if the tire is unused.  There some disagreement over how to best express this age limitation, but my take is:

If you live in a hot climate (AZ, CA, NV, TX, and FL) then the limit is six years.  If you live in a cold climate (MN, ND, WI, MT, etc), then the limit is 10 years.  States in between are  ..... ah ........ in between.

So, yes, you should be worried - not because the vehicle sat for 3 years, but because the tires are 15 years old.