Sorry, but no.
Tubes have no effect on structure. To get a sense of why, try inflating a tube outside of a tire, and you'll find max pressure of less than 5psi.
That said, there is some wiggle room on max pressure. Manufactured products vary including tires. The rated max is low enough that the worst example would be OK. So if you didn't draw the shortest straw, you're OK to push things a bit.
However, the stress the tire imposes on rim flanges is proportional to pressure X width, so wide HP tires are hard on rims.
If you're open to it, there are various charts about tire width and pressure based on axle weight.
Last edited by FBinNY; 04-09-24 at 09:25 AM.