Originally Posted by RBolton
Kenneth, I am not trying to Hi-jack your thread. I know you are concerned now about your tires and that deserves more discussion - I think.
I understand about the stresses on a trailer wheel in a turn. Should one assume that a rim - even if always used with the same ply tire will eventually weaken over time and need to be replaced. Or will they stay good indefinitely (in general) and only split (in general) when ply is increased?
Should I be concerned with the 40 year old wheels on my Argosy even though they look to be in fine shape?
It sounds like you are saying that the rims get use to the lower stresses and then in their complacency are not ready to accept the added stress of the higher ply tire and crack under the load. It seems to me that the rim would have to be on the way out anyway, compromised in some way or marginally bad already for the higher ply tire to break it.
Understand, I am not doubting that what you say is true. You have forgotten more about trailering and Airstreams than I will ever know. I'm just trying to understand what changes the rim is going through to cause this type failure.
Maybe this makes more sense.
When you use a steel wheel within it's ratings, they last a long long time, unless they have some rust on them.
It's when you push it beyond what it has been use to for many years, with additional stresses, it simply lets go.
Sort of like us fellows do, when we reach that "senior" plateau.
If 30 or 40 year old wheels create doubts in your mind, for heavens sake, replace them.
For safety's sake, that's real cheap insurance.
We all replace things when they break. We seldom replace somethings, that should be replaced, when, enough is enough.
We don't wait for a tire to blow, when they have aged out or have enough miles. We replace them of course. That's a very good judgement call.
If safety is "EVER" a question, the answer is simple. DON'T.