Tire pressure

[texcraig]

Same here, My real good gauge, 37 psi, car reads 35 psi, they do go to 37-39 while driving, thats normal. I gave up on using tire sensors to set pressure. Just use a good gauge and go with that, just look for big changes on sensors.

[TireCrawlerNikki]

Have Nitrogen air put in the tire and or have bead sealer applied to the wheel. This should make it more stable. Though some change may still occur.

[cdn2usa]

Originally Posted by Fearer2010SS

Same concept, nitrogen gas expands and contracts. This is one of the biggest crocks of bull I've seen from dealers lately, they charge $9.99 to fill up each time at mine. I mean is it really that hard to go to a 7 Eleven and fill your tires up? While oxygen does have a slight corrosive effect unless your planning on keeping your original tires for 15 plus years I wouldn't worry about it.

I agree with you. The air we breathe is made up of 78% Nitrogen and 20% Oxygen. If the theory that 100% Nitrogen does not expand, then why does Nascar not use it?

[Boxer4PSI]

Originally Posted by cdn2usa

I agree with you. The air we breathe is made up of 78% Nitrogen and 20% Oxygen. If the theory that 100% Nitrogen does not expand, then why does Nascar not use it?

I too used to be part of this "nitrogen is BS" belief.

However, I have nitrogen in my Camaro tires without any tire pressure issues, and in the last few days temps here have gone from 65 to 20 and back up to 55 degrees, before dropping below freezing again.

I've also used nitrogen in my old Durango 4x4, and it maintained tire pressure for a full year before having to be adjusted.

[TOMS1SS]

Originally Posted by Boxer4PSI

I too used to be part of this "nitrogen is BS" belief.

However, I have nitrogen in my Camaro tires without any tire pressure issues, and in the last few days temps here have gone from 65 to 20 and back up to 55 degrees, before dropping below freezing again.

I've also used nitrogen in my old Durango 4x4, and it maintained tire pressure for a full year before having to be adjusted.

I bet there is someone out there in the world....a special individual....who decided why go with just nitrogen when hydrogen is the most common element in the universe. The results would be somewhat interesting.....

[RubyCamaro]

Originally Posted by SM0KE

I have nitrogen in my tires.
Made it through winter with no flucuation in pressure at all.

That is very cool. Thanks for noting this. Mike was checking & adjusting mine a couple of times a week through the winter because my tire pressure sensors would say one or more tires were low. That would save a lot of trouble.

[MMC]

Originally Posted by cdn2usa

I agree with you. The air we breathe is made up of 78% Nitrogen and 20% Oxygen. If the theory that 100% Nitrogen does not expand, then why does Nascar not use it?

They do use Nitrogen in racing including NA$CAR, some forms of racing use even more exotic gasses. Biggest advantage is its completly dry, the moisture in compressed air makes the pressure fluctuations greater than a dry gas. Is Nitrogen worth it to the average driver? Who knows.

[Rock-It Man]

Time to break out the high school chem or physics book and review PV=RT.

The pressure goes up with temp at the same rate for all gasses. The only benefit of using N2 is that it may contain less water than ambient air. Any water in the air will condense out at low temp, and may change to gas if you tires get over 212F (that's not gonna happen in street driving) raising pressure more than dictated by the gas law. But, when do your tires get over 212F?

So for street use, N2 in the tires is a total waste of money.

[Transfusion]

It's a warm sunny spring day in California and i decide to drive North on I-5 from LA to SF. The temp when I leave at 07:30 is 72 degrees and all four tires register 35 Lbs. As I drive North will the tires on the east side of the car become more reactive and inflate before the tires on the west?

[CamaroBC]

what if your psi reads 47 on some tires?

[Rock-It Man]

Originally Posted by CamaroBC

what if your psi reads 47 on some tires?

Time to lower the pressure.

36 psi cold is then correct pressure, cold. Obviously, cold means one thing in the summer and another in the winter. Here's what to do: park your car outside in a shady spot. Let it sit for 2 or 3 hours, and then adjust the pressure to 36 psi. Repeat when the seasons change.

That's all.

[rolnslo]

General rule of thumb is that your tire pressure will change 1lb for every 10 degrees of temperature change. If it's 75 degrees when you put your cold tires at 36lbs, and then the overnight temp drops to 45 degrees, your tires will likely be at 33lbs or so. I opt to do my cold 36lbs early in the morning when the temperature is the coolest so the PSI only goes up as the day gets warmer.

[stso634]

Just found a TSB about this issue. #05-03-10-003D: Low Tire Pressure, Leaking Cast Aluminum Wheels (Repair with Adhesive Sealant) - (May 11, 2009). Says there may be some corrosion along the bead area. If there is just a little, the Dealer repairs it. If there is a lot, you get new wheels. I'm taking mine to the Dealer in the morning.