Recommended Tire Pressure dropped from 2017 2500 (20s) to 2022 2500 (20s)???

[chrizz28]

I traded in my '17 2500 Laramie 6.4 on OEM 20s for my '22 2500 Laramie 6.7 on OEM 20s and noticed the tire pressure door card says 65 PSI all around. I'd swear my '17 (did have 5th wheel tow prep package - my '22 does not) was 80psi all around. I saw that my truck was delivered with >80psi in all tires which I understand is a shipping thing (I did search before asking) because my dealer's idea of prep was to poorly wash it and certainly nothing else. Spend 83k and it is still covered in factory wax crayon marks on the exterior paint

Long story short... does anyone know if this is a thing? Related to the higher payload of the 6.4L truck? Higher weight of the diesel truck? Terrible wear of the OEM tires? Thanks for your input!

 

[iflyskyhigh]

I traded in my '17 2500 Laramie 6.4 on OEM 20s for my '22 2500 Laramie 6.7 on OEM 20s and noticed the tire pressure door card says 65 PSI all around. I'd swear my '17 (did have 5th wheel tow prep package - my '22 does not) was 80psi all around. I saw that my truck was delivered with >80psi in all tires which I understand is a shipping thing (I did search before asking) because my dealer's idea of prep was to poorly wash it and certainly nothing else. Spend 83k and it is still covered in factory wax crayon marks on the exterior paint

Long story short... does anyone know if this is a thing? Related to the higher payload of the 6.4L truck? Higher weight of the diesel truck? Terrible wear of the OEM tires? Thanks for your input!

I’m still trying to figure out the “optimal tire pressure” thing as well.

Someone recommended I drop my 2022 2500 down to 60 PSI all around. I did. Made a huge difference in ride. (Also have 20” night edition wheels, no 5th wheel prep)

Mine also came with 80PSI+ on delivery. Was causing my fillings to rattle loose. (Tire pressure was also not matched at all delivery, PSI’s were all over the place)

Trying to get info now on what my tire pressure should be when towing, if any different from the 60 daily driving. …

 

[MtnRider]

Curious, what is the max PSI written on the tires (and what make/model are they)? It's going to be based on that. Wonder if they changed tires because of the shortages.



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[iflyskyhigh]

Curious, what is the max PSI written on the tires (and what make/model are they)? It's going to be based on that. Wonder if they changed tires because of the shortages.



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Not home to look, but they are the crappy Firestone tires everyone hates.

 

[Crusty old shellback]

Look up your tires on the manufactures website. Then look for the weight of your truck and what PSI you need for each tire to support it.
I run 45/40 unloaded in my truck. I raise it when necessary when I'm hauling a load.
That 65 or 80 PSI figure is for when you are fully loaded hauling max weight.
Lots of threads on here and other info on the web about it.

 

[CharlieL]

Curious, what is the max PSI written on the tires (and what make/model are they)? It's going to be based on that. Wonder if they changed tires because of the shortages.

I’m still trying to figure out the “optimal tire pressure” thing as well.

Trying to get info now on what my tire pressure should be when towing, if any different from the 60 daily driving. …

The Firestone Transforce that came with my 2500 are marked as max load 3,640 lbs at 80 psi. LT285/60R20s

Found this link as helpful info. https://tirepressure.com/lt285-60r20-tire-pressure

 

[iflyskyhigh]

Thank you. I kinda searched but didn’t find much. Just figured I wasn’t searching the correct wording.

I’m guessing if I drop them down to 45/50 I’ll have to get into the OBD and change the threshold????

 

[iflyskyhigh]

The Firestone Transforce that came with my 2500 are marked as max load 3,640 lbs at 80 psi. LT285/60R20s

Found this link as helpful info. https://tirepressure.com/lt285-60r20-tire-pressure

Okay so looking at that chart…the “max load single” is PAYLOAD single rear wheel????

So if my max payload is 2100 my tires should only be inflated to about 37 PSI????

 

[iflyskyhigh]

Look up your tires on the manufactures website. Then look for the weight of your truck and what PSI you need for each tire to support it.
I run 45/40 unloaded in my truck. I raise it when necessary when I'm hauling a load.
That 65 or 80 PSI figure is for when you are fully loaded hauling max weight.
Lots of threads on here and other info on the web about it.

Can you give me an example weight you tow/ haul and what you PSI you inflate to when towing / hauling that weight?

 

[CharlieL]

Okay so looking at that chart…the “max load single” is PAYLOAD single rear wheel????

So if my max payload is 2100 my tires should only be inflated to about 37 PSI????

Well, I read the info the other way around. If you're running at 35 psi, your per-tire payload is limited to 2020. So, if you're at 37 psi, yes, your max per-tire payload is about 2100. Obviously, if you're running max psi of 80, you can run at any payload below 3640. I'm running 60 psi all around, so my max payload with that psi is 2950 per tire, or 5900 on my rear axle, which is 6040 GAWR. Yes, I could run lower psi for better ride comfort right now, but I'm fine with the ride as is.

I've not yet got a CAT scale weighing, but plan to get that done with "traveling" payload of full fuel & def, fifth wheel hitch installed, me with wife & our two dogs. Do have a truck stop here in ABQ with a CAT scale. I figure that once I get that done, I'll have better info about making pressure decisions.

 

[iflyskyhigh]

Well, I read the info the other way around. If you're running at 35 psi, your per-tire payload is limited to 2020. So, if you're at 37 psi, yes, your max per-tire payload is about 2100. Obviously, if you're running max psi of 80, you can run at any payload below 3640. I'm running 60 psi all around, so my max payload with that psi is 2950 per tire, or 5900 on my rear axle, which is 6040 GAWR. Yes, I could run lower psi for better ride comfort right now, but I'm fine with the ride as is.

I've not yet got a CAT scale weighing, but plan to get that done with "traveling" payload of full fuel & def, fifth wheel hitch installed, me with wife & our two dogs. Do have a truck stop here in ABQ with a CAT scale. I figure that once I get that done, I'll have better info about making pressure decisions.

Ohhhhhhh!

Okay. Thank you for the explanation. That makes sense.

Okay, so if I’m reading it correctly, since my truck has a 2100 pound payload there is really never any reason for me to have more than 42/43 PSI????

So I could just put in 42/43 PSI and never really have to worry about changing it no matter what I’m doing?

 

[MtnRider]

Not home to look, but they are the crappy Firestone tires everyone hates.

Actually I was asking the OP, should have quoted him. Wondering if he has the same tires as everyone else or something different? Very odd to see the door say 65 unless they changed tires

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[CharlieL]

Ohhhhhhh!

Okay. Thank you for the explanation. That makes sense.

Okay, so if I’m reading it correctly, since my truck has a 2100 pound payload there is really never any reason for me to have more than 42/43 PSI????

So I could just put in 42/43 PSI and never really have to worry about changing it no matter what I’m doing?

You are welcome for the info. However, not quite how I see psi situation. Your truck's payload is max weight you can load into the truck (people, what's in bed & tongue weight of your new Airstream). The max load on the tire is total weight - which would be payload in addition to the truck's existing weight. The way it seems to me, since the rear axle is 6040 GAWR, I should be fine running 60 psi while towing my set up. (might decide to go to 65 after CAT weigh with 5th wheel connected). I can't see any reason to be over that, as at 65 psi, the 3085 max per-tire would equate to 6170 lbs, which exceeds the GAWR.

 

[iflyskyhigh]

You are welcome for the info. However, not quite how I see psi situation. Your truck's payload is max weight you can load into the truck (people, what's in bed & tongue weight of your new Airstream). The max load on the tire is total weight - which would be payload in addition to the truck's existing weight. The way it seems to me, since the rear axle is 6040 GAWR, I should be fine running 60 psi while towing my set up. (might decide to go to 65 after CAT weigh with 5th wheel connected). I can't see any reason to be over that, as at 65 psi, the 3085 max per-tire would equate to 6170 lbs, which exceeds the GAWR.

Duh! Okay.

NOW I got it.

I completely understand all the pieces I just wasn’t thinking of the total overall weight picture as it relates to those numbers.

Appreciate it. Thanks for taking the time to explain.

I was planning to weigh it when I got the airstream to get an accurate number.

But as another person suggest I should be good to run around unloaded at 40-45psi all day long, would you concur?

 

[chrizz28]

Actually I was asking the OP, should have quoted him. Wondering if he has the same tires as everyone else or something different? Very odd to see the door say 65 unless they changed tires

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I have the same Firestone Transforce tires on both my '17 and my new '22. Just thought it was so weird that the recommended pressures from Ram dropped given how similar the trucks are.

 

[CharlieL]

Duh! Okay. NOW I got it.

But as another person suggest I should be good to run around unloaded at 40-45psi all day long, would you concur?

Glad to be of help. I'd say that running 40-45 psi should be no problem from a tire load perspective. I don't know what kind of potential underinflation wear might result from running in that psi range. There are members on this forum much more knowledgeable than me about tires, so I'll defer to their advice. Hopefully, others will chime in to provide some input.

 

[Crusty old shellback]

Can you give me an example weight you tow/ haul and what you PSI you inflate to when towing / hauling that weight?

I had the truck fully loaded and pulled a 5K trailer with it. I ran 50 all tires and had no issues. Wear pattern looked good.
Mine is a 21 Power Wagon on 35" BFG KO2s.

If you really want to know what pressure to run, do the chalk test on the tread. Plenty of videos out there of how to do it.
When I put BFGs on the truck, we set them at 50 PSI unloaded.i could see daylight under the outer edges of the tread, so I lowered it to 40/35. Went to 45/40 as it needed it. I may drop the rear down to 37 here soon. Outer edge is not fully on the ground.

 

[iflyskyhigh]

I had the truck fully loaded and pulled a 5K trailer with it. I ran 50 all tires and had no issues. Wear pattern looked good.
Mine is a 21 Power Wagon on 35" BFG KO2s.

If you really want to know what pressure to run, do the chalk test on the tread. Plenty of videos out there of how to do it.
When I put BFGs on the truck, we set them at 50 PSI unloaded.i could see daylight under the outer edges of the tread, so I lowered it to 40/35. Went to 45/40 as it needed it. I may drop the rear down to 37 here soon. Outer edge is not fully on the ground.

I’ll look it up thank you

 

[Rockcrawlindude]

Nobody even batted an eye that the truck was $83k? Everybody must be getting used to this inflation.

 

[woody284]

Nobody even batted an eye that the truck was $83k? Everybody must be getting used to this inflation.

That is what’s insane to me as well. 83k is common but nuts. My old school brain still tells me 40k is what a new truck should cost. Now a 6 year old truck with 100,000 miles is over 40k.

I had been running my stock 275 Firestones at 50/52 but my low pressure light stayed on. ( I don’t have the stuff to change the limit). I aired back up to mfg recommended 60/65 and the instant mpg on the dash went up .5 first trip. I came from a carli leveled / leaf spring F250 so the 60/65 ride quality on the Ram doesn’t bother me. Still better than the F250 with camper package.