[oil pan 4]

Originally Posted by BrandonMods

There's no reason any of those gases would pull any measurable heat out of your tires any more than the nitrogen would,

Oh really?

Originally Posted by oil pan 4

The 2 main ingredients of R-404a are kind of cool.
R-143, the main ingredient (aka canned air) has some interesting inferred absorbing properties.
R-125, HFC-125 is kind of neat too, in its other life its used for fire suppression, it pulls heat away from burning material so fast it shuts down the combustion process, in addition to suffocating the fire. Not a bad material to have inside your tire.
R-134a, (only 4% of the blend) is there to make the other 2 play nice when inside a heat pumping system.

So R-125 sounds like the best thing, but I would be willing [to bet a pure or high % mix] has already been tried by its self and not favored.

I noticed they don't use nitorgen in fire suppression systems.

Originally Posted by BrandonMods

and it also seems kind of irresponsible to test your theory on the road with no idea how those gases react with the tire material under heat & load, while pulling trailer loads of welding equipment.

Argon and Helium should not react at all with the tire material, they are both ideal gases of group 8 on the periodic table with full valencies meaning they do not react unless under extreme conditions, (I doubt the inside of a tire at a higher temperature is a concern). If the CO2 were to react the only reaction it would undergo is an oxidation reaction where it would gain another oxygen and become carbonate, again unlikely given the conditions and the carbonate would not react with the tire material as it would be a very weak base. The refrigerant might react, it depends on what its chemical make-up is.

Well I don't think there will be any on road helium tests. I am expecting helium to leak out really fast.

Did you read any of the other posts?

Originally Posted by oil pan 4

I know the gases I am going to test have been used on road [and on the race] track before.
A company called stayfill sells a fluorocarbon to fill vehicle tires, likely HFC-125 (fire suppressant), R-134a, or "canned air" aka R-143.

All the likely canidates used in stayfill are found in R-404a.
My money is on "canned air" (R-143a).
CO2 is widely used to fill tires on motor cycles, according to stayfill CO2 is the main bottled product they compete against.
Street legal off road and jeep guys often use CO2 to fill their tires after going off road before the drive home.
CO2 is very stabile.

Originally Posted by oil pan 4

An R-404a mixture was used in F1.

These numbered "R" chemicals are stabile to some where in excess of 400'F. At those temperatures the tires is likely on fire already, then at that point would you rather have a tire filled with air, or fire suppressant?

And why does everyone assume this is going to be a welding trailer. I live in the ghetto. The trailer will not fit in the garage and it wont fit in the back yard. If I left welding equipment out side on the trailer crack heads would decend on my valuables like roachs on a chinese restraunt after hours. Anything they couldn't steal, like something bolted to the trailer would have leads cut off or be broken from attempts to pry or hammer it free.
Or they would just steal the trailer, contents and all.

The heaviest load I plan to carry on this trailer is water tanks filled with water. Or stranded electric vehicles.

I weighed my mostly finished tandem axle trailer. It weighed in at 1720lb with no wood decking or tool boxes.