Originally Posted by
smd4
Experiment? 
So you must be riding those new fangled aluminum rims that don't experience metal fatigue? Can you turn me on to those?
You're postulating a "safety" factor over the recommended max of some size. If you don't really know what that factor is (if indeed it does exist), any time you exceed the spec, you are testing that.
Missed the point on the metal fatigue thing, I see. You were claiming "so far, so good". My point is you really don't know that because you may be accelerating metal fatigue or creating some that wouldn't otherwise occur. Your answer to that is other things can cause metal fatigue, I guess, and that's a profoundly stupid answer.
I'm pretty sure I don't want to be near your steam engine, btw. What you write about running that over spec has the "famous last words" ring to it.
https://allthatsinteresting.com/gene...im%20instantly.