From Trailer life Magazine
Tire Lifespan
It seems counterintuitive, but trailer tires that are regularly used can have a better lifespan than those that are kept in storage. During use, tires release compound lubricants that can help extend tire life. A tire that is not in use can degrade from ultraviolet (UV) exposure.
The life expectancy of a trailer tire varies from manufacturer to manufacturer; however, most are between
3 to 8 years, regardless of mileage. Carlisle Tire estimates that one-third of a tire’s strength is gone in approximately 3 years. Carlisle says to consider replacement after 3 years, regardless of tread depth remaining; and at 5 years definitely replace. That’s just one company’s recommendation.
Other tire manufacturers generally suggest a tire be replaced at 7- or 8-year intervals. Frequent and detailed inspection can help you gain perspective on the tire’s ongoing condition as its projected lifespan nears its end.
- See more at:
Rolling Along Safely: A Tire Guide