Tire Pressure

[AWLINK]

Hello, Checking to see what tire pressure every one is running in there stock tires on a 2500. Thinking about lowering mine to help the ride when we are not towing the camper.

 

[Ramrodd]

I run 60 in the front and 65 in the rear. Then when I’m towing I run 70 and 75. I’m not sure why I do this because I feel no difference. Maybe I’ll just leave the towing psi in them next time.


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[mlrtimemach]

60 psi front 70 in rear.

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[retired]

45psi in rear and 48psi in front give or take. that is with Toyo E rated 35's.

 

[tron67j]

Lowering your tire pressure might/might not give a noticeably softer ride, but it could cause faster wear and reduced steering capabilities. Lowering tire pressure will also increase the amount of time rubber stays in contact with the road, increasing heat build up in the tire. A top reason for premature tire wear is improper inflation.

 

[retired]

Lowering your tire pressure might/might not give a noticeably softer ride, but it could cause faster wear and reduced steering capabilities. Lowering tire pressure will also increase the amount of time rubber stays in contact with the road, increasing heat build up in the tire. A top reason for premature tire wear is improper inflation.

I have always used the 10% rule when it comes to tire inflation. It has worked well for me. My guess is a tire would suffer worse wear if jacked up to maximum psi on an empty truck especially in the back. The Max psi are for max loads and running empty you are not even close to that. Some people use the chalk method but that really has never worked well for me with an e rated tire. Toyo has a nice chart to tell you how much psi to run based on tire and needed capacity. Safest thing someone can do is go weigh their truck and weigh front and back axles and go from there.
https://www.toyotires.com/media/3729/application_of_load_inflation_tables_20200723.pdf

 

[tron67j]

Clas mentioned above, following tire manufacturer recommendation is always the best way to ensure a tire is properly inflated for the intended use. Softening or stiffening the ride is most likely not a function that tire pressure changes were intended for. That is what shocks and springs are for. Often the problem we read and hear about is that a person wants to tow and carry a lot, but then doesn't like the dry weight ride. Those two things are not possible to maximize on the same vehicle with the right investment of time and money. So changes should be made with the proper actions, that's all I am saying.

 

[Motoman501]

With Cooper XLTs in stock size I run 50 front and 45 rear. The ride is much better and they're wearing great. When I tow the travel trailer I just air them up.

 

[HEMIMANN]

I don't know how you guys can run lower than 70 psi in rears, cause one of the software "upgrades" throws an alarm below that. Previous software was 60 psi. The official FCA reasoning was "truck is designed for that".

My ass - the lawyers mandated it to dummy-proof from owners forgetting to air up when loaded.

 

[retired]

I don't know how you guys can run lower than 70 psi in rears, cause one of the software "upgrades" throws an alarm below that. Previous software was 60 psi. The official FCA reasoning was "truck is designed for that".

My ass - the lawyers mandated it to dummy-proof from owners forgetting to air up when loaded.

yup have to dumb it down for the least capable thinkers among us.

 

[Motoman501]

I used Alfa Obd to turn off the alarm.

 

[HEMIMANN]

yup have to dumb it down for the least capable thinkers among us.

Corp isn't concerned about intellect - they're concerned with keeping their loot from us.

I don't even know what AlphaOBD is, much less know how to turn off alarms. Proliferation of electronics has overwhelmed me.

 

[Motoman501]

I hear ya on the electronics. I used to like techy stuff, now I want to throw it against the wall.

Alfa Obd is an app that you can use with an Obd plug and unlock cable which allows you to access settings in your truck. Unfortunately it seems I can't change much in my 2019 but turning off the tire pressure alarm was one thing that worked.

 

[retired]

Corp isn't concerned about intellect - they're concerned with keeping their loot from us.

I don't even know what AlphaOBD is, much less know how to turn off alarms. Proliferation of electronics has overwhelmed me.

I hear ya on the electronics. I used to like techy stuff, now I want to throw it against the wall.

Alfa Obd is an app that you can use with an Obd plug and unlock cable which allows you to access settings in your truck. Unfortunately it seems I can't change much in my 2019 but turning off the tire pressure alarm was one thing that worked.

I am about as techno savvy as the average 62 yoa and AEV procal Snap is as simple as it gets. psi threshold lowered, speedo calibrated not much more I need.

 

[wgreggking]

Cooper xlt E 10 ply stock size, between 60-65 psi. When towing heavy the rear goes up to 70 psi. Ride was better, and wear on the last set of the xlt's made 50 K mi. no issues.
I ignore the yellow light unless it's flashing.
I live on a washboard dirt road,when I picked it up new, all tires were at 80psi, almost dangerous.

 

[HEMIMANN]

I hear ya on the electronics. I used to like techy stuff, now I want to throw it against the wall.

Alfa Obd is an app that you can use with an Obd plug and unlock cable which allows you to access settings in your truck. Unfortunately it seems I can't change much in my 2019 but turning off the tire pressure alarm was one thing that worked.

Storytime - worked on one of the first really big diesels (3,000 hp) in the 90's to get full authority electronics. One of the digital commands was to ramp up from idle speed to synchronous generator speed.

When first attempted, the damn thing took off and ran away on us. In those days, you could be in the test cell during the test, which we were. The Tech's had the presence of mind to hook up a legacy controller to shutdown all electronics on overspeed signal, which happened. It still burst through the rotating mass overspeed threshold, though.

My sphincter's been permanently puckered ever since.

 

[Razzman]

When not towing I run 62F/60R there's no reason to run a high pressure all the time unless your towing/hauling heavy. My door sticker says 65psi all around.

 

[RandomRam]

45 front, 40 rear with the stock Transforce 275/70r18 tires. I lowered the TPMS threshold to 30 all around. This pressure works well in the winter and seems to wear fine empty.

 

[lpennock]

I don't know how you guys can run lower than 70 psi in rears, cause one of the software "upgrades" throws an alarm below that. Previous software was 60 psi. The official FCA reasoning was "truck is designed for that".

My ass - the lawyers mandated it to dummy-proof from owners forgetting to air up when loaded.

Wasn't FCA that did it, it was the Feds. Due to TRA lobbying, the FEDS mandated that TPMS must be set to trigger at the minimum tire pressure required for the rated axle load of the truck. (i can't remember if the allowed deviation is 5 or 10% below that number). At the time the FEDS were debating the rule, both FCA and GM argued and showed that over inflated tires for the load increased stopping distances. TRA and the FED position was that the increase in stopping distance unloaded was less of a safety risk than the blow outs caused by an overloaded tire for the pressure (Think the Ford/Firestone issue). As such, starting around 2014 all TMPS are required to be set to the tire pressure required for the rated axle load. So you get stuck with the ~70psi rear trigger point.

Do to this law the ability of a dealer to modify the trigger point was removed from the diagnostic software the dealer uses so they can't change it. Software like AlfaOBD can modify it though.

 

[HEMIMANN]

Wasn't FCA that did it, it was the Feds. Due to TRA lobbying, the FEDS mandated that TPMS must be set to trigger at the minimum tire pressure required for the rated axle load of the truck. (i can't remember if the allowed deviation is 5 or 10% below that number). At the time the FEDS were debating the rule, both FCA and GM argued and showed that over inflated tires for the load increased stopping distances. TRA and the FED position was that the increase in stopping distance unloaded was less of a safety risk than the blow outs caused by an overloaded tire for the pressure (Think the Ford/Firestone issue). As such, starting around 2014 all TMPS are required to be set to the tire pressure required for the rated axle load. So you get stuck with the ~70psi rear trigger point.

Do to this law the ability of a dealer to modify the trigger point was removed from the diagnostic software the dealer uses so they can't change it. Software like AlfaOBD can modify it though.

Oh, good lord!

I guess I should curl up in the closet in a fetal position for the remainder of life so as not to get a scratch.