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Calculated for your given info in post #??
With the pictures.
Used nex in my made extra safe spreadsheet .
Weigt on 2 axles 4 tires 10000 lbs.
Lowered the 124 loadindex by 6 steps to 118, to give the tires a deflection needed for 99mph, and added 11% to the 10000lbs.
Gave 77 psi as advice, and this is with maximum reserve, withhout bumping or things all over the place.
And I did not care about the official rules of tires needed for 7000 axles. Only looked at it by rules of nature.
The 10000 lbs weight was fully loaded you wrote, and the 11% adding is done to cover unequall loading RL, wich can even be crossed between the axles.
But also to cover inacuracies in measurement of pressure and weight.
Have to look back if your loadindex for the sise is given , as most ST , for 65mph, if 75mph as L speedcode suggests, Only 4 LI steps less so 120 loadindex. Will come back to that in a next post.
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