Tire Pressure - What should it be..really?

[Sebastian]

mine are on cold 36psi. i just follow whats written inside the car.

[Sebastian]

and whats the car monitor says is never correct, specially after 1 or 2 hours on the highway, always far too high.

[oldfriend]

Originally Posted by bradshaw

36 is correct, always follow the cars recommendation for proper handling.

Yeah , at 36 psi , but on which gage , there will be at least a dozen or so different readings on one tire at anytime .

[edgehead2000]

Originally Posted by Parag

the max psi is for setting the bead. for stock size always go with the body tag. but if you put 22's on, you want to adjust accordingly

Just curious... what would 'accordingly' be? I always use 38, anything less and the car feels sluggish for some reason, like you're carrying a flat.

[The Stig]

Originally Posted by oldfriend

Yeah , at 36 psi , but on which gage , there will be at least a dozen or so different readings on one tire at anytime .

an analog gauge. You should keep one in your glove box - though most people don't.

[Earl]

36

[mth35115]

Also, if you over inflate your tires your car will ride like a folk lift, (rough as hell). Your tire absorb a lot of the road's irregularities, like pot holes, railroad tracks, ect.

[Rock-It Man]

Originally Posted by Comrando

Only if they had the same boiling point, which they don't.

Another reason to use nitrogen is to reduce the amount of moisture in the tire. Moisture will lower the boiling point.

All gasses obey the gas law, PV=RT. The only benefit is that the Nitrogen will be free of water, which will turn to gas if the air in your tires reaches 100 deg C. That's not gonna happen, except on the racetrack, maybe.

But the gasses in the atmosphere all stay gaseous at any temperature you will ever encounter, and so will all see the same pressure increase.

Nitrogen in tires is BS.

[EMB135Driver]

Originally Posted by Caspers2SSRS

Unbeknownst to most is the correct formula used to determine the recommended cold tire air pressures of any passenger automobile. Its pretty simple

The gross vehicle weight divided by one hundred (GVW in lb/100) equals the recommended tire PSI when cold.

Do you have a source for this formula....I think it Unbeknownst to most because this is pure BS....(its very good BS though). I think I'll stick with going by what the engineers at the Manufacturers Research and Development Department came up for a recommended cold pressure as long as I have stock size tires.

[90503]

Originally Posted by Earl

36

Is this for each tire?? or the cumulative total of all four...lol

[mikeyroche]

Originally Posted by The_cartoonist_88

I keep mine at 36. Always go with the vehicle recommendations

This, it is on area where the door closes (Drivers side). It tells you how much pressure

[mikeyroche]

Originally Posted by Rock-It Man

All gasses obey the gas law, PV=RT. The only benefit is that the Nitrogen will be free of water, which will turn to gas if the air in your tires reaches 100 deg C. That's not gonna happen, except on the racetrack, maybe.

But the gasses in the atmosphere all stay gaseous at any temperature you will ever encounter, and so will all see the same pressure increase.

Nitrogen in tires is BS.

Not really BS at all. We use it at work all the time on the Aircraft. Nitrogen is far more superior then air

[Mr_Draco]

Originally Posted by mikeyroche

Not really BS at all. We use it at work all the time on the Aircraft. Nitrogen is far more superior then air

Nitrogen in aircraft and nitrogen in cars are to different monsters.

It has been proven that there are benefits to nitrogen in aircraft due to the pressure and temperature differences between ground level and cruising altitudes. However in automobile tires there haven't been any proven benefits over normal compressed air. Race cars and dragsters are the exceptions.

[Pelirrojo80]

Is the low pressure alarm suppose to go off at 32psi? I came back from a deployment and one of my tires was at 25psi and I didn't get any alarm.