Ballast rim guard and proper inflation

Billrog · Dec 4, 2016

If that were the case an over inflated tire would never explode.

adventure bob · Dec 5, 2016

When I got my tires filed, Rimguard recommended that my tires be filled to the same PSI as they were if they were not filled. The volume of air in the tire is smaller, most of it now being beet juice, but the pressure of the volume that remains should be the same. That pressure is what supports the total volume and ultimately footprint of the tire on the dirt.

94BULLITT · Dec 5, 2016

I air the tires down till I have a nice even contact patch. Some tires you can let them flat (0psi) and the tire will not have a flat contact patch. On my L4240 I run 10 psi in the rear. Keep in mind if you are your front tires down and you have a loader then you lift a heavy load they may bulge. So if your are doing 3PH work you may want to run one front tire pressure then if you are going to be lifting heavy with the loader you may want to up the pressure.

oosik · Dec 5, 2016

I ran the same pressure - 18 psi - before and after Rimguard was installed. At 18 psi I get full tread contact with the ground, with or without Rimguard, which is what I want.

ovrszd · Dec 5, 2016

I knew my point would get reaction. It always does. No argument from me. Just telling it like it is. My proof is the pic I attached. That's a 17 or 18K vehicle sitting on 3 tires with 2-3 psi. How can that be possible?? And before you say it,,,,, no it's not because the tire is an exceptionally heavy tire designed to do that. If you take one off the rim it's as flimsy as an ATV tire.

My theory says the tire's ability to carry weight is because of the cubic feet of atmospheric pressure air that it contains. I don't have any formulas to post to back that up. Just hands-on visible proof. Maybe someone would like to air down one of their vehicle tires to 2-3 psi and post a pic of the result???

adventure bob · Dec 5, 2016

No reaction, no controversy, your observation just cant violate the laws of physics.

ovrszd · Dec 5, 2016

adventure bob said:
No reaction, no controversy, your observation just cant violate the laws of physics.

Yep, I understand and accept that. What's the explanation of the pic I posted?

murphy1244 · Dec 5, 2016

ovrszd said:
Yep, I understand and accept that. What's the explanation of the pic I posted?

Show us a pic with a gauge attached.

:stirthepot::stirthepot:

ovrszd · Dec 5, 2016

murphy1244 said:
Show us a pic with a gauge attached.:stirthepot::stirthepot:

Well, it's not my Big A and not sitting in my driveway, but I would if I could.

I deal with tire pressure all the time in many different sizes of tires. I normally run 4-6 psi in my buggy tires which weighs 4000 lbs with more squat than that Big A's tires. How can that be?

Again, run your own tests. Grab a gauge and air down your pickup tire to 4-6 psi and take a pic.

Again, I'm not a book educated philosopher. I base my knowledge on personal experience. Maybe the more educated can explain to everyone why the rear tire of our tractors require less psi than the front tires?? Think about it a second before answering.

adventure bob · Dec 5, 2016

You posted that "Cubic feet of air not pressure carries the load." Boyles law and the definition of pressure and volume contradict your statement. "The absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it occupies if the temperature and amount of gas remain unchanged within a closed system" By its definition it is the pressure exerted on the walls of the closed system that allows the pliable container to resist deformation. In this case your tire. The volume only describes the interior of the 3 dimensional space your tire contains. The volume of your tire will not change as long as you don't punch a hole in it. So if the volume is fixed, the only variable here that you can affect is the pressure. Occasionally mother nature will affect temp.