Tires should be inspected for cracks.
With no cracks, you should be good for some time.
Also depend on the tire size, some are good beyond believe.
When I bought my vintage bus conversion, the 22.5 tires had cracks around the rims in the size where I could stick tip of my finger in.
Yet pumped up hold for few hundred miles before I replaced the split rim wheels.
Later on out of curiosity I started to cut the tire.
Commercial tire has 3/4" of rubber on sidewalls close to the rim.
Car tires not much above 1/8"