GMC Terrain, Equinox, and SRX Forum banner

1 - 16 of 16 Posts

·
Registered
Joined
·
4 Posts
Discussion Starter · #1 ·
Just how accurate are the TPMs. Mine reads about 2 psi below the tire guage I normally use. The guage says 36psi, the tpm says 34 psi. Which is correct?
Ken
 

·
Registered
Joined
·
715 Posts
I don't know that the pressure sensors in the tires are any more or less accurate than the average tire gauge an owner has.

Just my opinion, I'd go with the reading that's the lowest.

A couple of extra pounds won't hurt and my help with tire life, fuel mileage and handling.

These are highly regarded gauges.

http://www.getagauge.com/index.cfm
 

·
Registered
Joined
·
949 Posts
My sensors read the same way. However, they haven't always been inaccurate. I have 11,000 miles and I've noticed it become inaccurate after the last few thousand miles. There was no tire rotation or anything done in this time, so I know it's not that.

I actually have that first tire gauge on that site above.
 

·
Registered
Joined
·
166 Posts
My TPM always shows a few pounds less than my hand held Accu Gage
 

·
Registered
Joined
·
949 Posts
This is why I was wondering if when you "reset" the tire pressure sensors, like when you rotate the tires, if it kind of recalibrates the sensors, or if there is even a way TO recalibrate them. Seems pointless if they consistently read inaccurately.
 

·
Registered
Joined
·
300 Posts
I don't care if they are super accurate I think the main purpose is to let you know if one tire is much lower then the rest of them and which one it is.
 

·
Registered
Joined
·
10,498 Posts
Don B said:
I don't care if they are super accurate I think the main purpose is to let you know if one tire is much lower then the rest of them and which one it is.
:thumb:

Exactly !
 

·
Registered
Joined
·
949 Posts
Don B said:
I don't care if they are super accurate I think the main purpose is to let you know if one tire is much lower then the rest of them and which one it is.
I agree 100%. However - if mine have only become inaccurate in the last few thousand miles, my concern is if they progressively get MORE inaccurate. Know what I mean? It would be annoying to have properly inflated tires and hear that chime go off every time I start the car, telling me my tire is under inflated.
 

·
Registered
Joined
·
715 Posts
I run my tires at 40 lbs. normally. I long trip coming up and I'm bumping them to 43-45 lbs.
 

·
Registered
Joined
·
10,498 Posts
dwendt44 said:
I run my tires at 40 lbs. normally. I long trip coming up and I'm bumping them to 43-45 lbs.
Wow - doesn't sound safe to me, but what do I know ?

:banghead:
 

·
Premium Member
Joined
·
931 Posts
dwendt44 said:
I run my tires at 40 lbs. normally. I long trip coming up and I'm bumping them to 43-45 lbs.
Sounds to me that it would put alot of excessive wear especially to the center tread...not counting unsafe.
Over-inflation not good.
 

·
Registered
Joined
·
715 Posts
Don't know about he 'un-safe' part, but I have a couple of acquaintances that run at the MAX pressure on the side of their tires.
That's more than what I run.

No problems in several years. Two cars and a 4X4 Dodge Ram.

I have rarely seen tires worn out in the center of the thread.
 

·
Registered
Joined
·
2 Posts
IceMan said:
Sounds to me that it would put alot of excessive wear especially to the center tread...not counting unsafe.
Over-inflation not good.
I usually run mine at 38-40 With no issues, and a good "dependable" gauge will make the difference when airing them up, just for the sake of discussion does anyone know if they are filled with Nitrogen from the factory or just "air'......inquiring minds wish to know.... ;D
 

·
Registered
Joined
·
10,498 Posts
jettech01 said:
I usually run mine at 38-40 With no issues, and a good "dependable" gauge will make the difference when airing them up, just for the sake of discussion does anyone know if they are filled with Nitrogen from the factory or just "air'......inquiring minds wish to know.... ;D
I doubt if they are using 100% Nitrogen, because if they did, they certainly would be saying it in their advertisements, right ?
 
1 - 16 of 16 Posts
Top