What PSI are you running for daily driving?

It's doesn't say 29?

 

I am running BFG KO2, 285/70/17 (Load E) and I run 40 PSI for my daily (albeit short) freeway drive to work.

 

FYI;

All things being equal, a wider, shorter contact patch (like from a larger, wider tire running at lower psi) is more likely to cause a tire to 'float' and lose traction, especially on hard packed snow. A narrower, longer contact patch will provide better traction on the same surfaces.


There's a lot of physics that goes into it, but the broad strokes can be found here:

http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=10

 

3rd sentence states "If you're likely to drive through deep snow this year, you'll want winter / snow tires and wheels in sizes that help put the laws of physics on your side. - See more at: http://blog.tirerack.com/blog/hunte...-tires-better-for-winter#sthash.bHZSXhwP.dpuf" maine may be different depending where you live but MAYBE once a year im forced to drive through unplowed "deep" snow. maybe my idea of deep snow is different but rarely if ever have i felt a vehicle "floating" more often than not its hard pack ice. and i still think a bigger contact patch and softer tire would help in this situation. almost like buying tires for the exception. yeah ive gone in mud puddles once or twice but i wont be buying MT tires next

 

I reset mine at 32ish so my low temp threshold is probably different than yours or the next persons. When changing pressure, you hold the button under the dash and it resets. Based on your logic, my light should be on?

 

If 32 is your average (it is) lets do a little math. 32-1=31! 32+1=33! Holy shit we are still not greater than 1 psi off average anywhere are we? Or am i doing math wrong too?

 

Oops. I made a calculation error the first time. It's approximately 32 PSI.

I start explaining here.
Be aware, this example uses LT265/70/17s.
The LT tables I posted includes 285/70/17s.
https://www.tacomaworld.com/threads...lift-pics-please.449869/page-11#post-14036365

 

Agreed. Why would a direct TPMS system have anything to do with how one tire relates to another?

 

285/70/17 bfg ko2 @ 36psi

 

lol, you never specified "average". And do I really have to go out and drop the air pressure some to prove you wrong?

 

Balmy 43 but you get the idea

 

34

 

Noticrd first time i aired down on a tril they didnt turn on light. Thought it was brilliant though i dont know exact parameters it goes on. Thought 2psi was the magic number but it isnt.. im at 29 in 3 corners and 27 on other with no light

 

After a quick google, the baseline appears to be 20% or 6-7PSI loss. So since mine was set at 32, which would put the low threshold at 25.6 and the light was on with the tire 25. My door sticker says 29, so 23 or lower should trigger it on a truck from the lot assuming it was initially reset at 29.

 

I believe it has to drop 10 percent to kick the light.

 

Fluctuates from 30-32, front tires don't seem to hit any lower than 31.

 

Promise it has to do with variation in pressure instead of just pressure. Been to 20psi without a light more than once

 

From the service manual:

(h) Rapidly reduce the tire pressure for each wheel at least 40 kPa (0.4 kgf/cm 2 , 5.8 psi) within 30
seconds.

 

That looks like it's just to test that the system is updating and not necessarily the threshold but did find this right after that section