What can I safely air down to with 31x10.5r15 tires on 15x8 wheels?

TJim

TJim

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I am waiting for your suggestions,

What pressures are “safe” to run with my 10.5” width tire on a 8” rim?

what psi on different terrains?
 
On road 22

Off road 10

The big question is...are you really finding a need for that much traction?

A lot of wheelers I know do the air down thing and I'm like...🙄🙄🙄...some of the shit they do could be done with 35 psi all seasons.

My keep shelly in athens friend....
You are running All terrains if I'm not mistaken. All terrains are marginally...and I stress marginally...better than All seasons. That's it.
All terrains...especially on a Jeep are much more cerebral than actually beneficial over an All Season.
If you're finding some need to air down All Terrains IMO you've got the wrong tire.
 
Rubicon88 said:
On road 22

Off road 10

The big question is...are you really finding a need for that much traction?

A lot of wheelers I know do the air down thing and I'm like...🙄🙄🙄...some of the shit they do could be done with 35 psi all seasons.

My keep shelly in athens friend....
You are running All terrains if I'm not mistaken. All terrains are marginally...and I stress marginally...better than All seasons. That's it.
All terrains...especially on a Jeep are much more cerebral than actually beneficial over an All Season.
If you're finding some need to air down All Terrains IMO you've got the wrong tire.
Click to expand...
I run 29 psi on road.
 
Rubicon88 said:
On road 22

Off road 10

The big question is...are you really finding a need for that much traction?

A lot of wheelers I know do the air down thing and I'm like...🙄🙄🙄...some of the shit they do could be done with 35 psi all seasons.

My keep shelly in athens friend....
You are running All terrains if I'm not mistaken. All terrains are marginally...and I stress marginally...better than All seasons. That's it.
All terrains...especially on a Jeep are much more cerebral than actually beneficial over an All Season.
If you're finding some need to air down All Terrains IMO you've got the wrong tire.
Click to expand...
Yes I am running All Terrains. Because it is my dd and I cannot justify having a second set of wheels yet.

Even 20 psi that you recommend for on road (which seems a bit low for me) would be somewhat of a air down compared to my current 29 psi on road
 
TJim said:
Yes I am running All Terrains. Because it is my dd and I cannot justify having a second set of wheels yet.

Even 20 psi that you recommend for on road (which seems a bit low for me) would be somewhat of a air down compared to my current 29 psi on road
Click to expand...
I'd run 28-30 psi for 31s on the street for even tire wear. I run 25 in my 35s.
 
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TJim said:
Yes I am running All Terrains. Because it is my dd and I cannot justify having a second set of wheels yet.

Even 20 psi that you recommend for on road (which seems a bit low for me) would be somewhat of a air down compared to my current 29 psi on road
Click to expand...
I said 22# on road...
But you evaded my other question/point...of the need to air down off road.

Are you really starving for more traction?

I truly appreciate your excitement of getting into the wheeling/Jeep world...but don't just start doing stuff because you've heard of or read of....
like someone airing down tires....just to do it.

Let me be crystal clear on something. This is on text so you can't tell my tone or intent...but I assure you I'm not being malicious whatsoever when I say this.....
You're removing a lot of the fun of off roading. Many of your questions are things you should be learning on your own...(part of the fun of off roading)

Like your question of airing down you even asked what psi on what terrain? These are things that you should be learning on your own. Again part of the fun of off roading.

Are you going to come to a trail head and see greasy, muddy, hilly, rocky terrain....
pull over...
whip out the phone...
post up a question...
hope for a quick answer...

before proceeding?


Questions are a great thing and can help a lot of people with a lot of things....

but....

asking questions pertaining to actual driving is being counterproductive.

You'll be a much better off road driver by experimenting with your machine and different situations and scenarios if you just get out there and do it.

You need to get out there...
play around, get muddy, get some undercarriage scrapes, get some close call stuck situations...get that intimidated feeling but try it...then that super hero feeling after you've conquered it...

^^^this is all part of the fun^^^



*****To add*****
My advice to you is this...
Whatever psi you're running on the street....run the same off road. Especially running All Terrains. It will make you a much better all around off road driver and give you a lot more knowledge than having us on the forum drive your Jeep for you.
Running your street psi will teach you the variations of wheel speed...(sometimes less is more...sometimes more is the only way)...sawing at the wheel to find the last little bit of traction....etc etc...
All of which nobody here can teach you. It's just something you need to experience and TRUST ME...You'll have much more fun trying things out and learning. Learning terrain, your tires and what they suck at, learning your machine, learning the proper gearing for a condition (low range/hi range and what gear on your tranny.....
Plus a million other intricate things while wheeling...
all while honing your driving skills.

Trust me my friend....get on the horse and gggooooo!!!
 
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Rubicon88 said:
I said 22# on road...
But you evaded my other question/point...of the need to air down off road.

Are you really starving for more traction?

I truly appreciate your excitement of getting into the wheeling/Jeep world...but don't just start doing stuff because you've heard of or read of....
like someone airing down tires....just to do it.

Let me be crystal clear on something. This is on text so you can't tell my tone or intent...but I assure you I'm not being malicious whatsoever when I say this.....
You're removing a lot of the fun of off roading. Many of your questions are things you should be learning on your own...(part of the fun of off roading)

Like your question of airing down you even asked what psi on what terrain? These are things that you should be learning on your own. Again part of the fun of off roading.

Are you going to come to a trail head and see greasy, muddy, hilly, rocky terrain....
pull over...
whip out the phone...
post up a question...
hope for a quick answer...

before proceeding?


Questions are a great thing and can help a lot of people with a lot of things....

but....

asking questions pertaining to actual driving is being counterproductive.

You'll be a much better off road driver by experimenting with your machine and different situations and scenarios if you just get out there and do it.

You need to get out there...
play around, get muddy, get some undercarriage scrapes, get some close call stuck situations...get that intimidated feeling but try it...then that super hero feeling after you've conquered it...

^^^this is all part of the fun^^^



*****To add*****
My advice to you is this...
Whatever psi you're running on the street....run the same off road. Especially running All Terrains. It will make you a much better all around off road driver and give you a lot more knowledge than having us on the forum drive your Jeep for you.
Running your street psi will teach you the variations of wheel speed...(sometimes less is more...sometimes more is the only way)...sawing at the wheel to find the last little bit of traction....etc etc...
All of which nobody here can teach you. It's just something you need to experience and TRUST ME...You'll have much more fun trying things out and learning. Learning terrain, your tires and what they suck at, learning your machine, learning the proper gearing for a condition (low range/hi range and what gear on your tranny.....
Plus a million other intricate things while wheeling...
all while honing your driving skills.

Trust me my friend....get on the horse and gggooooo!!!
Click to expand...

1) Sometimes I need more traction. Today for example, I didn't not. Half of the trip I was running 29 psi (my street pressure), and the other half I was running 15-16 psi.

I didn't really have any traction issues. But, I did for 2 reasons. My TJ was less bouncy, and at least in my mind to keep the tires a bit safer because of sharp rocky terrain. Today I didn't see any serious mud, just rocks and water crossings.

2) I am actually experimenting as much as I can. I have ran different pressures in different trips. The fact that I ask questions here does not mean that I don't go out wheeling or anything. I just enjoy talking about all this stuff. Today was my first off road day with the new setup though (rims/tires and lift). In Greece, the Covid policies are still quite strict, so movement from city to city is not allowed yet, so trips are very limited for now.

I also experiment a lot with 4 hi / 4 lo, when to use each, when to use each gear ( I have a manual), and I think I have built a good understanding of those so far. Out of experience and tips/advices too!

*I was wheeling my TJ at nearly stock setup before too! with 29" tires and stock suspension. You can understand that I did a lot of undercarriage scraping! Now, its time to explore the boundaries of the setup!

Thanks
 
TJim said:
I am waiting for your suggestions,

What pressures are “safe” to run with my 10.5” width tire on a 8” rim?

what psi on different terrains?
Click to expand...
You are asking a question that the only answer comes from you after experiment with different tire pressure on/of road for your chosen tire type and select what suite best for you.

If you want to know what is the safe lower pressure you can run before pop a bead, the number will change depending on the rim so no solid answers.
 
Jorge Bolivar said:
You are asking a question that the only answer comes from you after experiment with different tire pressure on/of road for your chosen tire type and select what suite best for you.

If you want to know what is the safe lower pressure you can run before pop a bead, the number will change depending on the rim so no solid answers.
Click to expand...
And honestly more than that...
Driving style...tire mfg...there are side walls that flex more than others even in same load range.

Doing the banzai around corners will pop a bead much faster than easy does it.

As we both mentioned the only answer is the one he experiences.

I still say this....if you are needing to air down for more traction with a BFG All terrain you're using the wrong tire.

@TJim I'm just telling you IMO you really need to just wheel that Jeep with street pressure. Those All terrains only make it so capable regardless...but will challenge you to be a better and more polished driver.

Again it's refreshing to see your exuberance for off roading but the best things and most fun is self learning.
 
DaveC said:
I also run 31/10.5s on 15x8 rims and run mine at 28 psi on the road and air down to 12 psi off road and have never had a problem.
Click to expand...

I have been experimenting with pressure. This last couple trips had been down to 9psi on the trail.

On road = 26psi
Off road 9psi
montanamnt003.jpg
 
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