In October of 2020, WE bought our first 5th wheel, a 2015 Heartland cyclone 4150. From what we can tell, it was left on a seasonal site since 2016. I am thinking the tires are original, and although t...
The side of the tire will have a date code on it, so no need to guess at age...but most likely they are the original tires, so 6-7yrs old. Yes, that's time to be looking at new tires.
When you calculated the load ratings, did you do it based on the GVWR or the GVWR minus the hitch weight. It's fine if you want to upgrade the tires but if you have excess capacity, that's should be fine.