donn0128 wrote:
LOOK! That is the only way to know for sure. A thorough inspection is the only answer. IF you don't know what your looking for take it to a good tire store and ask them to inspect the tires for you. Stand over their shoulder and watch and ask questions.
Good advice- your tires may have enough life left to go another season or more. Michelin (for example) doesn't specifically call for age-related replacement of its LT/P tires until after they're ten years old. See page 18/19
at this linkBUT:
After five years, they do recommend annual inspections "by a specialist". And that means someone who knows what to look for both inside and out, not just the teeny bopper at the corner tire store who takes a look at the wear bars.
The inside of a tire is where early warning signs of impending disaster can be seen, so if you go this route do make sure that whoever inspects yours demounts them and knows what to look for both inside and out.