Jump to content

P-rated Duratrac Tire Pressure?

Jv
 Share

Recommended Posts

Jv Enthusiast

Jv

Posted
Posted

Hello, I recently purchased metric 275/65/R18 116SL (Not LT’s) duratracs. Truck was born with P265/65/r18 at 35 PSI. Shop set my new tires at 38 psi which seems kind of stiff for a Non-LT tire. For those of you with P rated duratracs (or 116SL rated tires in general), what pressures have you been running? Using this website (https://tiresize.com/pressure-calculator/)

it’s saying that I should run 32 psi (!) to match the OEM spec for load capacity and tire wear. 32 psi seems way too low, even if it can support the same load. 
709A9425-AD3D-4A78-A481-C8CFE1A92817.thumb.jpeg.bf7505421e9218ee77802f49f381a6e8.jpeg

I read on here that the midnight edition 1500’s recommend 38 psi in their factory P265/65/R18’s duratracs. Can anyone confirm this? If this is what I’m supposed to run in mine then so be it. I called multiple shops and got multiple different answers but none below 35. 

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

Just run 35psi then. It really doesn't matter because once the tire warms up it'll be at 38-40psi or at 35-36psi if you set it lower than 35psi cold.

 

I don't have those tires but my tire pressures changes all the time, could be 70 degrees one day and 90 degrees the next, it changes my pressures just because of that. Add in humidity and that changes things even more. If my tires have over 32psi I don't even care anymore.

  • Like 2
swathdiver Senior Enthusiast

swathdiver

Posted
Posted

Not too low, my truck calls for the tires to be set at 30 psi.  Run them a few psi less than your door sticker says and watch for wear as you rotate them.

 

My NHT Sierra calls for different pressures front and rear.  38 psi out back.

  • Like 1
NWI Denali Enthusiast

NWI Denali

Posted
Posted

I am running p-rated Cooper Rugged Treks which are similar to the duratracs. Seemed the outsides were wearing a little faster during the first 7k miles so I have since bumped them up to 38

  • Like 1
  • Thanks 1
Jv Enthusiast

Jv

Posted
  • Author
Posted
On 7/1/2022 at 10:05 AM, NWI Denali said:

I am running p-rated Cooper Rugged Treks which are similar to the duratracs. Seemed the outsides were wearing a little faster during the first 7k miles so I have since bumped them up to 38

Makes sense. I have not had them long enough to see how they wear, but I did confirm elsewhere that the stock 265/65/18 Duratracs on the midnight editions do in fact call for 38 psi in lieu of the 35 psi for the regular all season tires. Must be for better wear if the engineers spec’d the stock Duratracs out for 38 psi from the factory. Thanks.  

  • Like 1
  • 2 weeks later...
newdude Senior Enthusiast

newdude

Posted
Posted

GM spec'd 38psi in the 265/65R18 Duratrac they used on the 14-18 trucks.  On Trail Boss/AT4 with 275/65R18 Duratrac they spec 41(?) psi but those are LT C load.  

  • Like 1
Jv Enthusiast

Jv

Posted
  • Author
Posted
14 hours ago, newdude said:

GM spec'd 38psi in the 265/65R18 Duratrac they used on the 14-18 trucks.  On Trail Boss/AT4 with 275/65R18 Duratrac they spec 41(?) psi but those are LT C load.  

I do find it interesting that they spec’d those 265/65 duratracs so high even though the load capacity for that size and load rating (114SL) caps at 36 psi. Wonder if it’s something specific to those duratracs, softer sidewalls perhaps. 

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.4k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,760
    Total Members
    8,960
    Most Online
    MASONV88888888
    Newest Member
    MASONV88888888
    Joined

  • Who's Online   4 Members, 0 Anonymous, 1,679 Guests (See full list)

  • Latest Articles

  • Posts

    • Coastie05
      Replacing 2.7L on 2021 Silverado with 2023 2.7L

      By Coastie05 · Posted

      I’m definitely interested to hear the end result here. 
    • MASONV88888888
      Another 6.2L engine failure!

      By MASONV88888888 · Posted

      My 2025 Silverado 1500 had to receive a brand-new engine (long block) under warranty last month at only around 16,500 miles. Before the replacement, the truck repeatedly displayed "Engine Oil Level Low" warnings, even though the Oil Life Monitor still showed around 50% remaining after about 6,000 miles since my last oil change. After seeing the warning several times, I checked the dipstick with the engine cold, and the oil level was completely normal. The next day, the message escalated to "Add Engine Oil." At first, I assumed it was just a faulty oil level sensor, so I brought the truck to the dealership. After inspecting the engine, they found internal cylinder wall scoring and ultimately replaced the entire long block under warranty. Before this happened, I was planning to install a 4-inch lift and suspension upgrade on my truck. After needing a new engine at just 16,500 miles, I honestly don't see the point anymore. I also contacted GM to ask whether my vehicle qualified for a buyback, but I was informed that it does not at this time. Anyway, this experience has left me with serious concerns about the long-term reliability of this engine. I sincerely hope NHTSA expands the current investigation or recall to include 2025 model and performs a thorough inspection of affected vehicles. My biggest concern is that these engines may fail shortly after the powertrain warranty expires. If GM truly stands behind this engine, then at the very least, please consider extending the powertrain warranty to 10 years for affected owners. That would go a long way toward restoring customer confidence.
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      Without exception but then I'm the odd duck, right? I know what goes into that test, how it is calculated and thus how to beat it. But EPA values are often not beaten by the general public and the government has in past years adjusted the means and methods to come to those values to more closely approximate "Joe Average".    The only real trick to beating that EPA average is don't drive like "Joe Average".    It's the same method you used to profit from "Economic Migration" and in doing so beat the 'stats'. But you, like me, are not "Joe Average".     The thing you don't seem to grasp is this "Purchasing Power Index" isn't forward looking. It doesn't predict what it going to be but looks backward and states what it was. They are not telling us what the THINK, they are telling us what they MEASURED. Example:    Wife says "I'm going to lose 40 pounds by Christmas". May she does, maybe she doesn't but the doctors office who weighed her when she made that statement and again at Christmas only REPORTS what the RESULT was. You and I can banter about what was possible and what aunt Tilly did till the cows come home but the result is the result. Arguing otherwise is.....irrational. That's all I'm saying. This isn't about:      What you are calling a 'Statistic' is a RESULT not a CALCUATION and as a result the RULE. Like gravity as a rule, it can not be broken. 
    • MASONV88888888
      Rattle in the rear!

      By MASONV88888888 · Posted

      Just wanted to say thank you for posting this. Years later, your thread is still helping Silverado owners.   I bought my 2025 Silverado 1500 in January 2025, and I've had what feels like the exact same rattle since day one. After reading your findings, I believe my truck has the same issue with the cable carrier contacting the rear sliding window. To be honest, I had pretty much given up on pursuing the issue. It wasn't until I recently drove another brand's pickup that I realized just how quiet their cabin was—and how noisy mine has been all along. On my truck, the rattle happens on almost any paved road, gets even worse on rougher pavement, and I can even hear it during braking and acceleration.   I actually referenced your thread when submitting my case to GM, hoping they'll recognize this as a recurring issue instead of treating it as an isolated incident. The reason I reached out to GM first is because my dealership told me they would need to keep the truck for at least two days just to diagnose the problem. I was concerned that even after two days, they still might not be able to identify the source of the rattle before giving the truck back to me. I had also asked a few dealerships about this issue during previous service visits, but none of them seemed to know what was causing it or had a solution. That's why I decided to contact GM directly first, hoping they might already have an official repair procedure or guidance for this issue.   I also hope GM eventually comes up with an official fix for this problem. I have a feeling there are many Silverado owners experiencing the same rattle, but most either choose to live with it or simply don't know what the cause is.   Really appreciate you taking the time to document your diagnosis. Your post is still making a difference years later.
    • Buckwild27
      Gas Prices

      By Buckwild27 · Posted

      I have 2 choices. 

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...