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You want answers but have never provided the specifics. You say Keystone put 7000# axles on a trailer that clearly doesn’t need anything above 6000#. The bottom line there is certification. What does the vehicle certification label depict for GAWR values?
Keystone would never put ST235/80R16 LRE tires on 7000# certified axles on a 2017 trailer, they don’t qualify.
We have to speculate on certified vehicle recommended inflation pressures being 80 PSI because that would be the norm for your trailer by Keystone.
If your replacement tires have a designated size of ST235/80R16, the correct inflation pressure for them would be 80 PSI. If the tires have a higher load range than the OE tires, 80 PSI would be the minimum for the replacements, options would start there and extend to tire sidewall max.
You barked up the wrong tree with aviation weight comparisons. I was an aviation structural mechanic for the USN for more than 40 years and have certified weight and balance training. The starting point would be the aircraft’s certified GVW. (22 ply rated aircraft tires fitted to a F4-B aircraft operating from a shore airfield have a cut and dried minimum of 350 PSI). Those same tires being aired for carrier operations would be set at sidewall max, 500 PSI.
To gain valid information for your questions you’re going to have to provide valid information, because all you’re currently getting is guesstimates.
That’s the end of the path for me in this thread
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