PSA: Check the air pressure in your tires!

Eoin

fishlessman said:

i have an air dryer on my air line.  betting my mechanic has a box of used green caps for the taking

The dryness is the benefit for minimising pressure variation with temperature. 

RRP

frazzdaddy said:

RRP said:

johnmitchell said:

I was told that if you put Nitrogen in your tires you won’t have that problem 

Well that's also want I was told at COSTCO when I had a new set of tires installed - 100% nitrogen they claim and I have yet to have any drop in pressure. Made a believer out of me!

Snake oil buddy

OK - but it comes standard at COSTCO plus FREE if any more needs to be added along with the FREE tire rotation. 

nolaegghead

Eoin said:

fishlessman said:

i have an air dryer on my air line.  betting my mechanic has a box of used green caps for the taking

The dryness is the benefit for minimising pressure variation with temperature. 

Right.  Exactly.  That's probably the biggest part of going N2.  N2 generators inherently make dry nitrogen based on the technology.   That's usually pressure swing adsorption by molecular sieve or membrane.

**

Anyway, we're talking 1.2 psi per year difference between *dry* air vs dry nitrogen over a year in leaking.  Any moisture with temperature swings exacerbates pressure swings.

thetrim

https://www.youtube.com/watch?v=akjXqfvLu28

What a moron.  He also can't throw a baseball. So glad he's gone.  He should've given out air pressure gauges instead of free phones.

HeavyG

thetrim said:

https://www.youtube.com/watch?v=akjXqfvLu28

What a moron.  He also can't throw a baseball. So glad he's gone.  He should've given out air pressure gauges instead of free phones.

Obama never gave out free phones. The program was started under Dubya.

It's impressive, and saddening, how someone can continually be impervious to factual knowledge.

Ozzie_Isaac

HeavyG said:

thetrim said:

https://www.youtube.com/watch?v=akjXqfvLu28

What a moron.  He also can't throw a baseball. So glad he's gone.  He should've given out air pressure gauges instead of free phones.

Obama never gave out free phones. The program was started under Dubya.

It's impressive, and saddening, how someone can continually be impervious to factual knowledge.

Ignoring the content, that was a good speech.  I miss the days of good speeches.  No matter what Obama said, he sounded good doing it.

*I am not disagreeing with his content, I am just ignoring it.

Legume

So...maintain pressure per door jamb or sidewall?  What’s the latitude above or below?

Botch

While the pressure inside a tire does go down with the temperature, the air outside the tire also chills, and gets denser.  This denser air pushes in on the tire sidewalls more, popping out the central divot in the tires' contact patch with the road, resulting in a matching situation.  
 
Prove me wrong  (and I love retirement! )  
 

cookingdude555

just bought this last week, love it.  set it at 35, pumped up the suddenly low tires from cold on 4 cars in about 10 minutes or so.  

thetrim

HeavyG said:

thetrim said:

https://www.youtube.com/watch?v=akjXqfvLu28

What a moron.  He also can't throw a baseball. So glad he's gone.  He should've given out air pressure gauges instead of free phones.

Obama never gave out free phones. The program was started under Dubya.

It's impressive, and saddening, how someone can continually be impervious to factual knowledge.

Keep drinking that!

caliking

HeavyG said:

thetrim said:

https://www.youtube.com/watch?v=akjXqfvLu28

What a moron.  He also can't throw a baseball. So glad he's gone.  He should've given out air pressure gauges instead of free phones.

Obama never gave out free phones. The program was started under Dubya.

It's impressive, and saddening, how someone can continually be impervious to factual knowledge.

I disagreed. I just think its impressive.

frazzdaddy

Legume said:

So...maintain pressure per door jamb or sidewall?  What’s the latitude above or below?

Door jamb

Legume

@thetrim slowly transitions from being completely duped by the internet, Qanon and Fox News to dropping full Florida crazy everywhere, setting up his later claim that it was all just good natured trolling.

As transparent as the big comb-over.

frazzdaddy

Legume said:

@thetrim slowly transitions from being completely duped by the internet, Qanon and Fox News to dropping full Florida crazy everywhere, setting up his later claim that it was all just good natured trolling.

As transparent as the big comb-over.

Trim and Scotty are both trolling. They are both much smarter than to believe that drivel they post. Don't take the bait.

frazzdaddy

Legume said:

So...maintain pressure per door jamb or sidewall?  What’s the latitude above or below?

Motor vehicles suspension and traction systems mfg today are engineered with a specific tire design built into the control unit software. That's  why it's important to use the oem recommended tire.

dbCooper

Has soapy water been replaced with a dry medium to lubricate the bead when tires are mounted?  If not, can dry air or nitrogen overcome all that moisture that remains in the tire after it is mounted?

frazzdaddy

dbCooper said:

Has soapy water been replaced with a dry medium to lubricate the bead when tires are mounted?  If not, can dry air or nitrogen overcome all that moisture that 

Yes, more of a waxy lube now.

nolaegghead

Botch said:

While the pressure inside a tire does go down with the temperature, the air outside the tire also chills, and gets denser.  This denser air pushes in on the tire sidewalls more, popping out the central divot in the tires' contact patch with the road, resulting in a matching situation.  
 
Prove me wrong  (and I love retirement! )  
 

Yes.  to a degree.  The tire volume is fixed.  That's why there's just one recommended pressure....has nothing to do with temperature.  Tires just need to be cold. but it takes more air when it's cold because it's denser.

The whole deal here is you set the pressure cold where the outside and inside air are the same temp.  What happens when you drive is the tire heats up and that drives up the pressure to where you really want it.  If you are low on air you generate more heat and you invite failure and uneven wear.  Over inflate and you don't have the heat problem but you lose traction and wear the center tread more than the outside and screw up your tire life.

nolaegghead

frazzdaddy said:

dbCooper said:

Has soapy water been replaced with a dry medium to lubricate the bead when tires are mounted?  If not, can dry air or nitrogen overcome all that moisture that 

Yes, more of a waxy lube now.

My buddy had a tire machine at the shop for motorcycle tires.  The lube helped them slip on.  Not sure if it is needed for leaks, but you def don't want anything that changes phase inside the tire.

nolaegghead

why the F is there political crap on this thread?  I'm trying to provide a PSA. 

SGH

I will never check the air pressure in my tires again. Never. 

SGH

nolaegghead said:

why the F is there political crap on this thread?  I'm trying to provide a PSA. 

Put on your mask and shut the fukk up.  

Legume

frazzdaddy said:

Legume said:

So...maintain pressure per door jamb or sidewall?  What’s the latitude above or below?

Motor vehicles suspension and traction systems mfg today are engineered with a specific tire design built into the control unit software. That's  why it's important to use the oem recommended tire.

That’s me, OEM all the way.

SGH

And get a damn haircut. 

SGH

And take a bath for Gods sake. 

SGH

I am going to let all the air out of your stupid tires. 

thetrim

HeavyG said:

thetrim said:

https://www.youtube.com/watch?v=akjXqfvLu28

What a moron.  He also can't throw a baseball. So glad he's gone.  He should've given out air pressure gauges instead of free phones.

Obama never gave out free phones. The program was started under Dubya.

It's impressive, and saddening, how someone can continually be impervious to factual knowledge.

So he never gave out free phones?  Why call them Obama's phone and Obama's stash?  If they started under Dubya, did he stop the program?  If then, he did give out Obama phones.

Stop the politics and get back to cooking... Oh wait, you don't do that either...

Why, again, are you here?

thetrim

nolaegghead said:

why the F is there political crap on this thread?  I'm trying to provide a PSA. 

You started it and @SGH sharted it!

Botch

nolaegghead said:

Botch said:

While the pressure inside a tire does go down with the temperature, the air outside the tire also chills, and gets denser.  This denser air pushes in on the tire sidewalls more, popping out the central divot in the tires' contact patch with the road, resulting in a matching situation.  
 
Prove me wrong  (and I love retirement! )  
 

Yes.  to a degree.  The tire volume is fixed.  That's why there's just one recommended pressure....has nothing to do with temperature.  Tires just need to be cold. but it takes more air when it's cold because it's denser.

The whole deal here is you set the pressure cold where the outside and inside air are the same temp.  What happens when you drive is the tire heats up and that drives up the pressure to where you really want it.  If you are low on air you generate more heat and you invite failure and uneven wear.  Over inflate and you don't have the heat problem but you lose traction and wear the center tread more than the outside and screw up your tire life.

Why are you ruining my Fun, here?  

Ozzie_Isaac

frazzdaddy said:

Legume said:

So...maintain pressure per door jamb or sidewall?  What’s the latitude above or below?

Motor vehicles suspension and traction systems mfg today are engineered with a specific tire design built into the control unit software. That's  why it's important to use the oem recommended tire.

OEMs have specific goals in mind.  If their goals of cheapest tire and most fuel mileage meet your needs, then by all means stick OEM.  I choose tires based on my specific needs.  OEMs have a lot to balance.  I do not need to make sacrifices due to fleet concerns.

I used to calibrate transmissions for an OEM.  I am very familiar with how they work.