I agree, we can just use what we know and can research. Tough choices to male. IMHO, when I walk through a CG, and look at tires on different rigs, a lot of cracking, under inflated, and just plain old worn out. I get past all the time by trailers going 70-80+ MPH, I am amazed that there aren't trailers broken down and lining the roads. Keep em inflated properly, inspected them, and watch your load weight and speed and hope for the best.
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