Vex...
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Science is the application of laws and mathematics to model and derive real world outcomes from basic knowledge.
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Note how the application of laws AND MATHEMATICS are used to model and derive real world outcomes? You're refusing to do the math under the premise that you're right? Prove it. As for thinking you're so intelligent that I wouldn't understand the math because I'm somehow beneath you for not going to the same classes as you in college? Jumping to conclusions again. I can't write programming for shit either, but it doesn't mean when a program isn't working I can't look at the code and see flaws in it. That doesn't mean I can program from scratch though.
The part I don't get is how you still can't understand that without the math you're speculating based on your understanding of the materials. YES, IT IS WEAKER. NO, THAT DOESN'T MEAN IT WILL BREAK. The math is what ties your your information about the materials to the theory that it is unsafe or will break. Without the math, you're talking theory.
If you want to argue dick size or IQ I've got enough of both. I'm not trying to argue that, I'm trying to argue that you can't stamp something as a fact without testing it or doing anything to prove it. I can cut through your BS and see that you aren't willing to do the math because of one of 2 options, 1) you don't know how (which based on your line of work I'd imagine you probably have the formulas) or 2) you're afraid that the math might give me more to argue with.
I understand the laziness factor; I wouldn't want to do 1-4 hours of math either to prove a point. But without it you're speculating. If you just admit that without the math you're speculating, then we can move on. As someone in the field of this type of mathematics I would venture to say that if you can't admit the math ties your premise to facts then I wouldn't imagine you're very good at your job. It's cool, some engineers get into the field because they heard there is money in it, not because they're naturally good at it.
Oh as for your question, I'm not sure what you're looking for here so I'll just list some stuff off the top of my head and let me know if I'm close to what you're looking for...
Tire pressure, weight on the particular wheel/tire, temperature of all materials and outside temperature, what the tires are filled with (nitrogen, air, helium), The stretch of the tire (still an inch and 1/2 of difference between the recommended wheel widths for a given tire without being outside of spec), the materials used for the wheel and tire, and camber.
Once in motion I would guess...
friction, shock/spring combination, lateral forces and additional compression from the various loads during cornering, braking, acceleration, bumps in the road, wheel/tire balance, toe, and caster.
I'm sure you'll find something I missed, but that's a basic list of shit off the top of my head.
I really can't understand why it's so hard to admit that mathematics is required to prove your point. Without it the only thing that you can say for a fact is that the tire is weaker, weaker =/= failure or unsafe.