this tire & 3 of it's close relatives were just three years old and as you can see, it still had lotsa good tread left

all five tires on the trailer(4 on the ground plus a spare, 2 different brands and 2 different ages) had issues
none of them lost any air
they were the correct size and load range and had been religiously checked before each trip
they sat 6 months, traveled 425 miles, sat 6 months & traveled 425 miles for 3 years
i made it to a tire shop that was open 7 days/week and had all 5 replaced with new ones
that was closer than i like to get on a Sunday afternoon of a holiday weekend
going anywhere w/o a spare is less than prudent
sw