Is it Groundhog day? Have I not read this thread before?
Language is ambiguous. We have to interpret what is said taking into consideration context etc. Because of this we sometimes misinterpret the intended meaning. If we try to remove ambiguity and take the words literally then conversations would stop. Just read your insurance document to see what happens.
Chads is indeed correct. Hardness has nothing to do with the thickness of material. And hardness and stiffness are two completely different things, so hardness shouldn't mean stiffness. I don't know if he thinks this is relevant or helpful, or he is just being amusingly pedantic.(I suspect the latter) If we just want to be pedantic then I would suggest he is wrong. The answer is not, no and no because you didn't put a question mark after the second question, so it is simply an ungrammatical statement, and the real answer is just, no.
Because of your second question, and other reasons, I believe that your first question was actually:- is axle stiffness in the same diameter of axle simply different wall thickness ?. The answer is yes and we have evidence to support this. I believe that it is likely that you only asked the second question to clarify what you meant in the first question. So I effectively answered yes to your second question first, meaning yes I can confirm that hardness in your first question should be replaced with stiffness and then answered yes to that new question. If you did intend your second question to actually ask another question as well as question your first question, then I presume it is something like this. Is stiffness of axle more relevant than hardness to the performance of a kart. To that I would also answer yes, but not with great conviction. This is based on my knowledge of metals and physics and is a hypothesis.
The other reason I feel you didn't want an answer to the second question is unless you plan to manufacture axles it has little relevance. If you buy an axle labelled soft, medium and hard and it should be labelled stiff, stiffer and very stiff, the relevance is still the effect it has on your lap times.
To add more coals to the fire, I would also add that changing the axle is probably a poor use of resources and you shouldn't do it.
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