I had a set of new name brand tires on my F150 a few years back that were *leaking through the side walls*! The local dealer replaced 3 of them - (separately, of course!) but just couldn"t justify replacing the last one - which also leaked down.
That was 6 years ago in NC. It was an old company with a good rep at the time. A while back I heard they were having some problems staying in business.