Join Date: Aug 2013
Location: Montana - Estados Unidos De Americana
When it comes to tires, the 3-5 year recommendation is so they can sell more tires. Plain and simple. That being said I have also bought brand new trailers and first thing I did was to yank the ching chong brand tires off of it and install quality trailer tires.
Why? Cheap tires are not worth the headaches.
When it comes to the lifespan of your trailer tires there are several things that will affect this such as where you park it, if you park your trailer on the dirt, and it sits for long periods of time, the tires will start to dry rot on the portion sitting in the dirt, where as if you back it up on some 2x10's when you park it, they will last much longer.
Also exposure to sunlight is a big deal too, In Oregon where you are it is not as much of a concern, but it still is. Covering your tires or parking your trailer in a shaded area will greatly increase the lifespan of the tires.
The other thing that really has more to do with it than anything is inflation, if you run a tire down the road under inflated, it gets hot, when a tire gets excessively hot it starts to break down, then it is a matter of time until it goes boom.
As far as bringing an unladen trailer home that you just bought, well like Dirty Harry said you just have to ask yourself "Do ya feel lucky? Well do ya?" For myself, I always have just inflated the tires when picking up a new trailer to make sure they were at the proper pressure and inspected the sidewalls, if the sidewalls are cracked, I may swap them out before towing, I may chance it, it is a gamble depending on how far I am going and how hot it is.