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Old 01-23-2023, 05:54 PM   #1
marshman
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Default Truck Tire Air Pressure

Just put a new set of tires in my truck. Had a leveling kit installed so went with bigger tires. They are 35x12.50x20. What air pressure should I be running? I know on the sidewall it says up to 80psi cold, but I know it’d ride like an old logging truck if I put that much.
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Old 01-23-2023, 06:14 PM   #2
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Quote:
Originally Posted by marshman View Post
Just put a new set of tires in my truck. Had a leveling kit installed so went with bigger tires. They are 35x12.50x20. What air pressure should I be running? I know on the sidewall it says up to 80psi cold, but I know itd ride like an old logging truck if I put that much.
Open your door and read the tag on proper psi for truck

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Old 01-23-2023, 06:27 PM   #3
PhotonSlinger
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Mine call for 80 and I run 60 until I load it down, then I bump up the pressure. Not the same size tire though. Hopefully you got a front alignment done after the lift, if not do it now.
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Old 01-23-2023, 06:37 PM   #4
marshman
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Open your door and read the tag on proper psi for truck

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The tag on the inside of door is for the stock tires. These new ones are bigger.
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Old 01-23-2023, 06:38 PM   #5
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Originally Posted by PhotonSlinger View Post
Mine call for 80 and I run 60 until I load it down, then I bump up the pressure. Not the same size tire though. Hopefully you got a front alignment done after the lift, if not do it now.
Yes an alignment was done.
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Old 01-23-2023, 06:38 PM   #6
TX03RUBI
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Quote:
Originally Posted by Duckologist View Post
Open your door and read the tag on proper psi for truck

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That only applies if you want to use the truck to its capacity.
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Old 01-23-2023, 06:41 PM   #7
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What kind of truck ie: make/model, and what is it primarily being used for?

Model and use is more important than the make, but others might have done the same to a similar truck and can offer first hand advice.
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Old 01-23-2023, 06:41 PM   #8
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Originally Posted by TX03RUBI View Post
That only applies if you want to use the truck to its capacity.
It doesn't apply at all if you change the tires.
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Old 01-23-2023, 06:41 PM   #9
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I typically run all my trucks at 40 unless I’m loading them down. 55-60 towing/hauling normal 5-10K loads with minimal weight applied to the truck. 10K+ with a gooseneck and I’m running the recommended 80 psi. 60+ rides like a tank with an unloaded truck.
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Old 01-23-2023, 06:43 PM   #10
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Quote:
Originally Posted by Dale Moser View Post
It doesn't apply at all if you change the tires.
Still want to run the recommended (sidewall not truck) psi to maintain capacity
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Old 01-23-2023, 06:56 PM   #11
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The truck is a Dodge Ram 1500
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Old 01-23-2023, 06:56 PM   #12
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Mine says 80 I run 55-60
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Old 01-23-2023, 07:03 PM   #13
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Quote:
Originally Posted by marshman View Post
The truck is a Dodge Ram 1500
Hell, I have two of those. A 2014 and a stock 2022.

My 2014 is leveled and running E range tires. I never put more than 50 in them, 39 is the recommended minimum pressure. The first set of Cooper STT Pros I put on it got a little over 67k out of them. They were a bit rough when I had them changed, but they couldve hit 70k if I wanted.

Keep them balanced and rotated every 4K-ish miles and run them at 45-50 PSI, unless towing a heavier load. You should be fine.
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Old 01-23-2023, 07:05 PM   #14
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39 for me. No and/or limited towing
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Old 01-23-2023, 07:11 PM   #15
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I run 20s on my 2500HD and I keep my tires at 65-70. Ride is smooth
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Old 01-23-2023, 08:06 PM   #16
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I had a set of load range E tires on a half ton truck. Kept them at 43psi. Had 80,000 on the tires when I traded the truck in. Discount tire recommended 43 for my set up and it worked great for me!
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Old 01-23-2023, 08:15 PM   #17
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My 2500 Ram will give me a low tire warning if I run them below 60, so I run 60 unless I have a load then I bump them up to 75
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Old 01-23-2023, 08:21 PM   #18
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Read the tag. It's usually pretty accurate
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Old 01-23-2023, 08:22 PM   #19
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Quote:
Originally Posted by PYBUCK View Post
My 2500 Ram will give me a low tire warning if I run them below 60, so I run 60 unless I have a load then I bump them up to 75
His is a half ton. On tires that are rated for that much max pressure, theyre going to ride rougher by nature. Start talking about much over about 50, that trucks going to bounce all over the place without a load on it.

OP, everyday driving, stay under 50 PSI. Low to middle 40s will work better for you in most cases. Air up/down as needed due to purpose.
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Old 01-23-2023, 08:44 PM   #20
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Keep adjusting pressure till you get even wear.
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Old 01-23-2023, 10:48 PM   #21
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I have a Toyota tundra crewmax. Im running 35s load range E nittos. First set after original tires were Nitto ridge grapplers. Ran them at 35psi. Got 85k out of them. I could have gone more. I have recon grapplers now with 35k on them and they will easily go to the 80k range as well. I run them at 35 too. I took sidewalk chalk and coated my first set and inflated them to 50psi and drove them about 1/4 mile in a straight line. In the beginning at 50psi there was only roughy 8 of the 12 tire with chalk missing in the middle. I kept deflating 5 pounds at a time and retested each time until all the chalk wore off the full width of tread.

Try the chalk test yourself and see.


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Old 01-23-2023, 11:01 PM   #22
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Ran my wrangler 4 door with load range E tires with 35 psi and got 120k out of them. Never towed more than a trailer with a side by side or a boat. Discount put 45 in them and it was wearing down the middle I let some air out and found where they wore the best. And makes for a way smoother ride.
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Old 01-23-2023, 11:02 PM   #23
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The door doesn’t matter anymore.
I had a Silverado. Door said 35. New tires shook the truck. Emailed bfg. They told me it needed to be 55.

Fixed it. No more shake.

Reach out to company. Different tires different specs
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Old 01-24-2023, 06:45 AM   #24
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Quote:
Originally Posted by FLASH_OUTDOORS View Post
I have a Toyota tundra crewmax. Im running 35s load range E nittos. First set after original tires were Nitto ridge grapplers. Ran them at 35psi. Got 85k out of them. I could have gone more. I have recon grapplers now with 35k on them and they will easily go to the 80k range as well. I run them at 35 too. I took sidewalk chalk and coated my first set and inflated them to 50psi and drove them about 1/4 mile in a straight line. In the beginning at 50psi there was only roughy 8 of the 12 tire with chalk missing in the middle. I kept deflating 5 pounds at a time and retested each time until all the chalk wore off the full width of tread.

Try the chalk test yourself and see.


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X2 for best ride and handling. Add air when loaded
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Old 01-24-2023, 06:58 AM   #25
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It doesn’t matter what your tires are rated for if the rims pressure doesn’t match. If running stock wheels, run tires at factory specs. If your rims do match and you are basically running 3/4-1-ton rated tires on a 1/2-ton run them where the tread wears even. It’s still going to beat you up



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Old 01-24-2023, 07:29 AM   #26
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I run 70, don’t like to add air or take out for anything
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Old 01-24-2023, 07:43 AM   #27
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tagged
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Old 01-24-2023, 07:55 AM   #28
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I run load range E tires on my half ton trucks. I run 40 psi. Rides like crap once you get above 45-50 psi. 10 ply tires are awesome!!!
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Old 01-24-2023, 07:56 AM   #29
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https://tiresize.com/pressure-calculator/
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Old 01-24-2023, 08:02 AM   #30
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40-45 for me. E rated on a tundra.
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Old 01-24-2023, 08:33 AM   #31
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On a half ton? I always ran 40-45 psi. I noticed above 35 psi, the tires wore really nicely. Above 50 psi, they tend to wear in the middle faster.
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Old 01-24-2023, 08:40 AM   #32
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On a half ton I’d run 40, running less will cup the tire. If you notice the tires wearing unevenly I’d bump it up to 45 but you should be good at 40.
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Old 01-24-2023, 12:20 PM   #33
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I had a set of E rated KO2's on my F-150. Got over 120K out of them when I traded the truck in for my new Ram Diesel. Always ran 55 front and 60 rear. Would bump up the rear to 65 if towing my lowboy trailer. Tires were rated for 80 also.
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Old 01-24-2023, 12:34 PM   #34
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My truck is a 1 ton SRW diesel with a front end replacement bumper hootus. I keep 65 in the front and 60 or so rear. I think my tires recommend 80, but it's too **** rough at 80, and the tires wear better at 60-65. I don't add any to the rears for towing/hauling unless I was planning a long trip with a heavy load. I had the gooseneck at 22.5k the other day, and the rear truck tires were fine.
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Old 01-24-2023, 12:37 PM   #35
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Quote:
Originally Posted by marshman View Post
Just put a new set of tires in my truck. Had a leveling kit installed so went with bigger tires. They are 35x12.50x20. What air pressure should I be running? I know on the sidewall it says up to 80psi cold, but I know itd ride like an old logging truck if I put that much.
F250 6.7 with replacement bumper

35x12.5x18

45psi front
40psi rear
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Old 01-24-2023, 12:43 PM   #36
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Do the chalk test and figure out what the truck/tires want. Make a chalk mark across the tread of your tires. Air them up and drive a very short distance. If the mark disappears in the middle and stays on at the edges of the tread, let air out and try again. Do this until the mark disappears evenly across the face of the tread and you’re good to go.
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Old 01-24-2023, 05:08 PM   #37
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Around 60 up front. You can go a little lower on the rear. If you go too low on the front, you will see the tires wear more round than usual on the edges.

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Old 01-24-2023, 06:51 PM   #38
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F250 6.7 with replacement bumper

35x12.5x18

45psi front
40psi rear
For context I have over 300k miles at these specs with Toyo AT2, Toyo RT, and BFG KM3s. No abnormal wear issues, infact my tread life usually out lasts MFG spec, which says a lot for 3/4 Diesel that has a rough life.

Its also how Carli suspension specs out all their 35 tire set ups
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Old 01-24-2023, 07:19 PM   #39
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BIL bought brand new F250 Lariat FX4 with a lot of bells and whistles package. He follows the door recommended pressure. If I ever spend call it $80k on anything that rides that HARD I am going to kick my own *** and the person who sold it to me. LMAO 🤣
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Old 01-24-2023, 07:27 PM   #40
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I started reading this and it didn’t take long before I put my hip waders on … to Wade through all of the Bewlchit on tire life.
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Old 01-24-2023, 10:35 PM   #41
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Your truck is a half ton, Id go 45 front and 40 rear. If you haul heavy just bump rears up to 45 or 50.

I run 50 front and 45 rear on my Cummins 2500. Carli suspension recommended this air pressure for my setup with their springs and track bars.


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Old 01-25-2023, 09:29 AM   #42
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My tire pressure light comes on at 36, so I run about 40. (lower load range tire than you are running)
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Old 01-25-2023, 09:50 AM   #43
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F250 60 in the back and 65 on the front. Unless I'm hauling heavy then adjusted PSI to 65 in the back
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Old 01-25-2023, 10:08 AM   #44
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Quote:
Originally Posted by BlackdirtCowboy View Post
Do the chalk test and figure out what the truck/tires want. Make a chalk mark across the tread of your tires. Air them up and drive a very short distance. If the mark disappears in the middle and stays on at the edges of the tread, let air out and try again. Do this until the mark disappears evenly across the face of the tread and youre good to go.

Several decent suggestions here but this is the best answer given.
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Old 01-25-2023, 11:10 AM   #45
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It is stamped on the side of the tire what they recommend.
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Old 01-25-2023, 11:20 AM   #46
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It is stamped on the side of the tire what they recommend.
No, the max psi is stamped on the side of the tire

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