1. Trailer tires are limited by time and use, and not tread life.
2. The mileage expectancy of a trailer tire is from 5000 to 12000 miles.
I consider myself an avid fisherman. Being in a club like Midweek, the lakes that I fish tend to follow the schedule of our club. When we have tournaments at the close lakes like Bartlett, Saguaro, Pleasant, and Canyon, I will usually prefish a couple of times, returning home each day. The further lakes like Havasu, Alamo, Roosevelt and Apache I usually only make one trip, but I stay at the lake for my pre-fishing, and therefore these trips are longer, maybe 3-4 days. In addition, I normally tow my rig to Mexico a couple of times a year for some of the best bass fishing on the planet. It was rather easy therefore to estimate my annual mileage, which in my case was 6000 miles. So after 2 years, I am right at the top of the life expectancy of my tires. So I guess getting 2 years out of my trailer tires based upon my fishing trips puts me towards the top of the scale regarding service life of the tires. So I guess I shouldn't complain too much. I just wish they would go flat in my garage.