Tire pressure calculator

[Brahmajoe]

I have a set of E rated MT tires. There is an overland tire pressure calculator I found online and plugged in the values. Does this seem appropriate in your opinions? I’m going from stock axle weight

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[Blade1668]

I run load range E tires I try to keep air pressure the same and higher than most on here. "45-50 psi" At lower pressure I found less MPG's, squirrel handling on roads, I noticed the same with stock tires too. My JT has a load 99.999% of the time though and a trailer a lot of the time.

 

[bd100]

Likewise, load range E LT all-terrain tires. Loaded and towing on the interstate at 70 MPH the back tires get alarmingly warm at 40 PSI. I moved to 50 PSI and the back tires are just a little warmer than the front. On another pickup of similar weight I've gotten even wear and long life out of similar tires under similar conditions.

Plus, you get good handling for evasive maneuvers and/or winding mountain roads.

My older truck's manual has a chart with the various tire sizes and the PSI to use, and then says to add more for interstate speeds, and more for hauling a load. The JT manual essentially just says to ask the tire manufacturer for suggestions, but does mention higher pressure may be required for higher speeds.

 

[smlobx]

I have a set of E rated MT tires. There is an overland tire pressure calculator I found online and plugged in the values. Does this seem appropriate in your opinions? I’m going from stock axle weight

Care to share the link? I’d be interested in seeing it.

At first glance I think it may be accurate and as far as the difference being too great I don’t think so There is quite a bit of weight difference also.

 

[Great Offender]

Care to share the link?

Quick search (and I've been wrong before) came up with this.
https://www.calconic.com/calculator-widgets/Tire-Pressure/61a69025fac0dd002a058f3f?layouts=true

Another similar link
https://silca.cc/pages/sppc-form

 

[SargeDiesel]

I have a set of E rated MT tires. There is an overland tire pressure calculator I found online and plugged in the values. Does this seem appropriate in your opinions? I’m going from stock axle weight

What vehicle are your calculations based on ? For some reason, the weights seem off to me. If you haven't, go to your nearest weight station or gas station w/a scale and weight it. The rear seems really heavy.

In my case, the rear is lighter and therefore the tire pressure is less than in the front.

Also, if you haven't already done so, do a chalk test, it will tell you exactly where you're pressure should be.

 

[Brahmajoe]

What vehicle are your calculations based on ? For some reason, the weights seem off to me. If you haven't, go to your nearest weight station or gas station w/a scale and weight it. The rear seems really heavy.

In my case, the rear is lighter and therefore the tire pressure is less than in the front.

Also, if you haven't already done so, do a chalk test, it will tell you exactly where you're pressure should be.

Jeep Gladiator specs

 

[SargeDiesel]

Jeep Gladiator specs

It seems like the calculations are missing the GVW . Your axle weight seems high. They add up near 7k pounds... I was thinking Gladiators were closer to 5-6k.

I have a diesel, so it's a little different.

I would get it weighed... and I might be wrong (nothing new) but your specs seem off.

 

[Brahmajoe]

Check your specs guys that’s all I can say

 

[SargeDiesel]

This is what I found for the Mojave on Jeep. com

This is generally what I found from othe auto sites

 

[Brahmajoe]

You can look up front and rear axle weight ratings

 

[SargeDiesel]

You can look up front and rear axle weight ratings

I tried, but the numbers were hard to find and inconsistent.
*That is why I suggested getting it weighed.

The only numbers that were the same across the websites were the curb and gross, which I posted.

Regardless, you can run at whatever pressure you wish. You will definitely find out if the psi is correct after putting on some miles.

I was just trying to be helpful, but I will happily bow out.

 

[Brahmajoe]

I tried, but the numbers were hard to find and inconsistent.
*That is why I suggested getting it weighed.

The only numbers that were the same across the websites were the curb and gross, which I posted.

Regardless, you can run at whatever pressure you wish. You will definitely find out if the psi is correct after putting on some miles.

I was just trying to be helpful, but I will happily bow out.

It’s my first time with mud terrains and I notice at speeds 7 and under there’s a vibration then it goes away. I thought it might be pressure but I guess it’s just the lugs grabbing

 

[SargeDiesel]

It’s my first time with mud terrains and I notice at speeds 7 and under there’s a vibration then it goes away. I thought it might be pressure but I guess it’s just the lugs grabbing

Yes lugs grabbing throw a lot of people off... it is a weird feeling and sound if you haven't experienced it...
Im glad you got it figured out.... cheapest fix you could have asked for... FREE... ha ha

As for the weights, my sticker is very similar to yours. Just a little heavier in the front for my diesel engine...

The reason I did not go with the sticker is because how it is calculated. I might be misinformed... but I believe the weights they spec at include:

both GAWRs (tires, suspensions, axles, etc.)
driver/passenger
max cargo and trailor tounge weight and max payload(which is why its showing heavier in the rear)

The best way I could describe it is GVWR is the maximum weight rating established by the chassis manufacturer. GVW is the total weight of the truck and payload at a point in time.

This chart helped me

I based my tire pressure closer to the curb weight... because I am usually alone with no additional cargo. I run 37x12.5x17 and they are E rated. Based upon the scale weight, I run around 33psi in the front and 30psi in the rear. My chalk test confirms this is a good pressure for my tire.

If you really want to be exact, I would load it up the way you normally drive it and get it weighed... if anything, for pieces of mind.

You might already know all of this.. if so I'm sorry for wasting your time, I really was/am trying to be helpful.

I'm glad you got it figured out though... nice

 

[Brahmajoe]

Yes lugs grabbing throw a lot of people off... it is a weird feeling and sound if you haven't experienced it...
Im glad you got it figured out.... cheapest fix you could have asked for... FREE... ha ha

As for the weights, my sticker is very similar to yours. Just a little heavier in the front for my diesel engine...

The reason I did not go with the sticker is because how it is calculated. I might be misinformed... but I believe the weights they spec at include:

both GAWRs (tires, suspensions, axles, etc.)
driver/passenger
max cargo and trailor tounge weight and max payload(which is why its showing heavier in the rear)

The best way I could describe it is GVWR is the maximum weight rating established by the chassis manufacturer. GVW is the total weight of the truck and payload at a point in time.

This chart helped me

I based my tire pressure closer to the curb weight... because I am usually alone with no additional cargo. I run 37x12.5x17 and they are E rated. Based upon the scale weight, I run around 33psi in the front and 30psi in the rear. My chalk test confirms this is a good pressure for my tire.

If you really want to be exact, I would load it up the way you normally drive it and get it weighed... if anything, for pieces of mind.

You might already know all of this.. if so I'm sorry for wasting your time, I really was/am trying to be helpful.

I'm glad you got it figured out though... nice

No I appreciate the help, I’m sure you have more knowledge then I do lol. That’s why I turn to the forums.

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