what 's the correct air pressure when doing it on sand, on highway, and on offroad.?

[tower]

Originally Posted by Steve #1

18 PSI? That's total right? As in 4.5 psi per tire?

For most vehicles / tires, it's not worth getting out of the truck, much less having to air back up if you don't go down to at least 10 PSI.

To get a good ball park, park on pavement and measure from the ground to the bottom edge of the rim. Reducing this distance by 25% will give you the largest foot print you can get (unless you want to get technical and do a ton of measuring). It depends on the tire and weight of the vehicle, but in most cases your looking at about 5 PSI, but may be anywhere from 2 to 10 PSI.

Seriously, what planet are you wheeling on? I've aired down to 15-18 for rock and 12 for sand that was fine as talc (Oceano Dunes, CA). Where the hell have you wheeled with 2 PSI in your wheels? The article you site does not even mention pressures less than 7 PSI. And nowhere does it recommend that. I guess you could read articles and Web-Wheel with zero or even negative pressure in your tires. What exactly do you personally carry to re-attach your beads? Or do they just adhere from the negative pressure (vacuum)?

[Steve #1]

Originally Posted by tower

Seriously, what planet are you wheeling on? I've aired down to 15-18 for rock and 12 for sand that was fine as talc (Oceano Dunes, CA). Where the hell have you wheeled with 2 PSI in your wheels? The article you site does not even mention pressures less than 7 PSI. And nowhere does it recommend that. I guess you could read articles and Web-Wheel with zero or even negative pressure in your tires. What exactly do you personally carry to re-attach your beads? Or do they just adhere from the negative pressure (vacuum)?

Apparently you also have a hard time reading.

All my off roading has been done on earth, but since you brought it up, on planets (or moons) without atmosphere special non pneumatic tires reinforced with wire cable or mesh are used.

I never said I had offroaded with 2PSI, I have gone down to 4-5 PSI on North Padre Island.

I'm not sure what the article I linked to said as far as PSI. I found that it gave a good explanation of the 25% rule (which was the point I was trying to make).

What do I carry to reattach beads? Well, here's a little list of things that can be used, which at any given time I may have an assortment of.

- High lift jack - handy for removing the wheel from the vehicle as well as pressing the wheel back on to the rim.

- Water and rags for cleaning the rim in order to get a good seal.

- A tire iron

- a valve stem tool

- high pressure air or CO2 tank

- can of starter fluid and a lighter - not saying it's safe, but most of the time it works.