Soundguy
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Never said the PSI was different...simple physics...you guys are misunderstanding the point I'm trying to make. Yes, the PSI is the same, but it changes the physical properties of the tire. The air container (tire) is fundamentally smaller (volume).
no it is not... the tire csing size / volume has not changed any. each internal square inch of that tire will have effectively the same pounds per square inch exerted on it whether it is a square at the top in the air bubble, or a square out on the side wall under fluid.
think of a well pump with bladder.. that bladder with compressed air is what gives you water pressure when the pump is not running.. the pressure of that air pressing on the bladder, pressing on the tank and pipes.
the reduced air volume only means there is less amount of give available as the amount the air can compress is reduced since the volume is reduced.
This makes for a smaller interior surface for the pressure to exert on. It does, in essence, create the effect of a smaller tire. It's not that hard to understand...you are overthinking a simple question of physics.
nope.. sorry.. same size tire. the imersed part of the tire is not immune from pressure just because it has a liquid over it.. that's why you don't fully load a tire as if it hit a shock load it could split.. no compressible material in there to take a shock load like air would.. the tire splits due to psi on the interior of the tire exceeding the burst rating of the tire...
I wear a size 11 shoe...it fits my foot...if I try to put my foot in a size 10-1/2, it will fit, but it exerts more pressure over the surface area of my foot and makes it uncomfortable...because I am trying to place the same volume of foot into a smaller vessel.
that analogy don't work with the tire, ballast and air pressure we are working on....
And I agree with rick.. you are debating useless minutia by keep bringing up the difference in compressability of the liquid in the tire, vs the air in the tire.. and in effect, diluting the otherwise practical information in this thread.
soundguy