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What's your PSI reading on your truck?


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Just curious...today my brother-in-law was airing up his tires and aired his up to 40 PSI and I had always thought a normal PSI reading should be between 32-34 PSI (depending on tires of course) so it got me thinking and I looked at my tires and the max is 44 PSI so I aired mine up to 40 to hopefully preserve the tires for longer. So just curious if y'all follow the cold tire recommendation or had your own methods?

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Don't use the number on the tire, use the number on the sticker on the drivers door post.

 

The label will have the correct pressure for the max load of the truck.

 

 

The tire has the psi for the max load that the tire is rated for -- but that does not mean it is the correct pressure for your vehicle (the tire doesn't know where it is installed!)

 

 

The sticker will have the correct pressures for the tires installed on the particular truck. Different tires may have different pressure recommendation.

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Don't use the number on the tire, use the number on the sticker on the drivers door post.

 

The label will have the correct pressure for the max load of the truck.

 

 

The tire has the psi for the max load that the tire is rated for -- but that does not mean it is the correct pressure for your vehicle (the tire doesn't know where it is installed!)

Seems like it would be the other way around. By this logic I would be running 275/55r17s on my 20 inch rims. Not saying your wrong about the tire pressure, but I believe that every situation is different. If the tire is optimized for 40 psi or whatever, that's what you should run.

 

 

Sent from my iPhone using Tapatalk

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Don't use the number on the tire, use the number on the sticker on the drivers door post.

 

The label will have the correct pressure for the max load of the truck.

 

 

The tire has the psi for the max load that the tire is rated for -- but that does not mean it is the correct pressure for your vehicle (the tire doesn't know where it is installed!)

 

 

The sticker will have the correct pressures for the tires installed on the particular truck. Different tires may have different pressure recommendation.

 

 

But what about in the case of having off-road tires where normal PSI should be 50-60 etc. but the truck sticker displays normal at 34 PSI?

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But what about in the case of having off-road tires where normal PSI should be 50-60 etc. but the truck sticker displays normal at 34 PSI?

 

this is what i was wondering

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Don't use the number on the tire, use the number on the sticker on the drivers door post.

 

The label will have the correct pressure for the max load of the truck.

 

 

The tire has the psi for the max load that the tire is rated for -- but that does not mean it is the correct pressure for your vehicle (the tire doesn't know where it is installed!)

 

 

The sticker will have the correct pressures for the tires installed on the particular truck. Different tires may have different pressure recommendation.

 

 

What if you're not running stock tires and/or wheels?

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Tire mfgr's have load vs PSI charts - find yours......... Air up per load........ Scale your truck front and rear axles empty full of fuel so you now your empty load..........

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What if you're not running stock tires and/or wheels?

Then you're SOL.....door sticker and manual only applies to what the mfr. placed on your truck and identical size and profile replacements which are optimal for all the suspension geometry, springing and dampening components. Other than that it's best guess on optimal air pressure, and sizes larger than OEM and/or with different profiles may well require road force balancing on specialized equipment to prevent unwanted vibrations introduced by the change in profile. Detailed in:

 

http://sandyblogs.com/techlink/wp-content/uploads/2017/03/GM_TechLink_01_January_2017.pdf

 

 

So throw on some pimp size wheel/tire combos then wonder why the damn thing vibrates like a hula dancer with St. Vitus.

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I painted a white stripe on the belt of all four tires, let dry and drove straight for one kilometer at 32 PSI. (Door recommends 35PSI) All four tires wore the paint on the 2 outside threads meaning I didn't have enough air, I inflated to 35 PSI and redid the test. All 5 threads on all 4 tires had pretty even threadwear but still slightly on the outside so went with that keeping in mind that pressure would increase with temperature.

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Just curious...today my brother-in-law was airing up his tires and aired his up to 40 PSI and I had always thought a normal PSI reading should be between 32-34 PSI (depending on tires of course) so it got me thinking and I looked at my tires and the max is 44 PSI so I aired mine up to 40 to hopefully preserve the tires for longer. So just curious if y'all follow the cold tire recommendation or had your own methods?

 

Ethan,

 

Ordinary OEM cold tire pressure (like sitting overnight) should be what's on your door sticker. Keep in mind that on a trip pressure will increase 10 - 15% so you're at or over the recommended maximum if you're set @ 40PSI cold.

 

I'm set @ 33PSI cold on OEM 265/65/18 tires and have seen the pressure increase to 37 - 38 PSI on long 70 MPH Interstate trips. I have found the GM OEM sensors to be "right on" comparing the DIC readings to hand-held gauges.

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Two degrees over the light at 40 degrees outside temp on stock 1/2 ton tires. I go for ride quality. When I ran 3/4- one tons I went to max cold pressure loaded.

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