P/U Tire Inflation ?
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=175021
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Topic: P/U Tire Inflation ?
Posted By: FREEDGUY
Subject: P/U Tire Inflation ?
Date Posted: 08 Oct 2020 at 6:34pm
| I run LT tires on a F250 SD and keep the PSI at 60. The sidewalls state one psi, the sticker in the door well says a different psi. What do you guys adhere to as far as "who's right" ?? |
Replies:
Posted By: Lars(wi)
Date Posted: 08 Oct 2020 at 7:07pm
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I follow what is stamped on the tire. ------------- I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science. |
Posted By: Boss Man
Date Posted: 08 Oct 2020 at 7:38pm
| I run what the tire says. Lower pressure gives a better ride but wont carry the weight. |
Posted By: DMiller
Date Posted: 08 Oct 2020 at 7:43pm
Fully agree to that, Tire manufacturer has the final say as to Tire Load at what Pressures. My 99 SD has 285/75 16s (E) on it, they are set to 75# and stay there. Low pressure when loaded increases drag and in turn adds heat from flexing.
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Boss Man wrote:Posted By: steve(ill)
Date Posted: 08 Oct 2020 at 8:19pm
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I think what is on the tire is the MAX pressure and MAX weight load.... If you are running empty, you may be a little STIFF riding.. Thats why some drop the pressure 10 #.... Suggested pressure on the door may be for a nice ride, average load..... also depends on the tire manufacturer.. could be a different rating for similar size tires. ------------- Like them all, but love the "B"s. |
Posted By: HD6GTOM
Date Posted: 08 Oct 2020 at 10:03pm
| After selling, installing, running on tires for 22+ years, go with the max inflation on the tire sidewall for the best fuel milage, best performance of the tire. UNLESS the new agressive tires are very squirrely driving on the hard surfaced road. Then you need to reduce the air pressure. Why? You are actually riding on the center 3 or 4" of tread. Lowering the air pressure will allow the tire to run in the full tread face, reducing tire squirming. |
Posted By: Red Bank
Date Posted: 08 Oct 2020 at 10:42pm
| If I am not pulling a trailer I run 65psi in all four tires. When I am pulling a trailer I will run 80psi in the rear tires assuming the tires are 10 ply. And that’s in my Fords |
Posted By: allisorange
Date Posted: 09 Oct 2020 at 6:45am
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Didnt Ford Motor and Firestone have problems when Ford lowered the pressure that was put on the tire. J Carlson
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Posted By: fixer1958
Date Posted: 09 Oct 2020 at 8:13am
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No point in running max air pressure if you are not loaded. I have a 2500Hd with load range E. I have 45 in the front and 50 in the rear unloaded. Rides better and easier on the tires. Loaded I kick up the pressure depending on what I'm doing.
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Posted By: steve(ill)
Date Posted: 09 Oct 2020 at 8:33am
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I do exactly as fixer and RED... Go to MAX pressure and you will get center tread tire wear if you are not FULLY loaded. ------------- Like them all, but love the "B"s. |
Posted By: Dakota Dave
Date Posted: 09 Oct 2020 at 11:07am
| the pressures listed on the door sticker are correct for the tires listed on the door if your putting load range E tires on and the door sticker calls for load range C tires and you pump them up to 80 PSI because the tire says so you are reducing your traction by a very large amount. you should always be running the tire pressure that matches the rated capacity with the load your carrying. this will give you the best ride, braking . handling and longest tire life. if your running different size tires or overated tires its up to you to lower the pressure. each manufacture publishes a load per pressure chart for their tires. or you can math to figure it out. https://www.4wheelparts.com/a/tire-wheel-package-guide-tire-pressure-checker" rel="nofollow - https://www.4wheelparts.com/a/tire-wheel-package-guide-tire-pressure-checker |
Posted By: FREEDGUY
Date Posted: 09 Oct 2020 at 6:31pm
Thanks guys, this truck has an 8 1/2' service body/ladder rack loaded 99 % of the time and the door sticker wants 75 psi in the fronts and 80 psi in the rears  . This truck left the factory with "no box" on it as per the paperwork  .
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Posted By: tomNE
Date Posted: 09 Oct 2020 at 6:50pm
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sorry to disagree but after getting mad about trailer tires, looking like new and blowing out, I dropped the max pressure between 10 and 20% and found my tires lasted twice as long. again i apologies for being different; i just ran the test myself and have no proof on paper. the paper i do have is old, it's from buying new trailer tires! ------------- AC from the start of my families farming career till the end! |
Posted By: ac fleet
Date Posted: 09 Oct 2020 at 7:37pm
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I go by the tire number.---if it says 45, thats what I run in them. ------------- http://machinebuildersnetwork.com/ |
Posted By: HD6GTOM
Date Posted: 09 Oct 2020 at 8:25pm
| Allisorange. Sorta, ford demanded Firestone build that tire to their specifications. Firestone engineers told Ford their tire design was destined to fail. But Harvey Firestone and Henry Ford had a handshake agreement to build tires for ford. Firestone went along with the agreement. Ford e engineers told Firestone "if there is a problem we will stand behind the tires.". There was a problem and ford bailed on Firestone. I was on a first name bases with a lot of the Firestone engineers when this happened. The tires that Firestone used to replace the bad tires looked the same but you could tell it was a different tire. The replacement tire was far heavier, sidewalls were far thicker. It was the tire Firestone engineers told Ford engineers to put on the exploders. If you bought a cheep f150 the following year, you got Hankooks. They were worse than the bad Firestone's. Rocks went thru them, some of them didn't last 50 miles on our rock roads. |
Posted By: Gary(MO)
Date Posted: 09 Oct 2020 at 8:31pm
| I drive a Ford F150 crew cab. Tires are 265/70r17. I run 38 pounds cold. I pull a lite trailer at times and leave tires at that pressure. Pounds go up as tires heat up on driving. Wife and I left for Montana couple of weeks ago and I checks tires at 38 pounds cold when left. Checked tires again in mountains one morning and they were at 45 pounds cold. Got home and tires were back at 38 pounds cold. I just thought thin outside air with tires full of heavy midwest air was the difference. I really don't know. Gary |
Posted By: nella(Pa)
Date Posted: 09 Oct 2020 at 8:48pm
X 2 |
Posted By: fixer1958
Date Posted: 10 Oct 2020 at 6:45am
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Personal preference I guess. To me it's like riding in a flat bottomed boat in the front seat in choppy water. I like my kidneys where they are. |
Posted By: steve(ill)
Date Posted: 11 Oct 2020 at 3:23pm
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Time to check the pressure in the wifes Ford FLEX today...While doing that i thought i would check the SPECS......... This thing has them no side wall / go fast tires... 255 x 45 x 20 size.... Tires are rated at 1800 pounds at 51 psi.... The CAR cant handle any where near that kind of load.......... Door sticker says 1600 pounds at 36 psi..... Dealer had them set at 34 psi and it is plenty STIFF for riding around with not much load.... This is on a 2019 with 15K miles so all factory set / tires/ etc.
------------- Like them all, but love the "B"s. |
Posted By: LouSWPA
Date Posted: 11 Oct 2020 at 3:56pm
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My experience, for what it is worth, is Ford truck suspensions will beat ya to death empty, no matter what. SO, unless hauling a load of any significance, I use the minimum suggested for the tire and don't worry about the gas mileage I'm giving up. That's my story and I am sticking to it! ------------- I am still confident of this; I will see the goodness of the Lord in the land of the living. Wait for the Lord; be strong and take heart and wait for the Lord. Ps 27 |
Posted By: tomNE
Date Posted: 11 Oct 2020 at 5:30pm
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don't forget that number for tire inflation is the max pressure. most tire jockey's aren't paid enuff to have done research on tire inflation and when was the last time they asked what your goals were with the tires------NEVER ------------- AC from the start of my families farming career till the end! |
Posted By: LeonR2013
Date Posted: 11 Oct 2020 at 7:44pm
| Where I used to work we had a problem with guys wanting to put larger a wider tires on their trucks. I had a chart that showed showed how wide the rim had to be, but they still wanted the wide tires. Trying to reason with them but they still wanted the wide tires, Sure enough before to long they were back with uneven tire wear, all the tire fault of course. Some people just can't get it. Leon |
Posted By: Calvin Schmidt
Date Posted: 12 Oct 2020 at 7:29am
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I've been pulling goosenecks for 50 years with a wide variety of GM pickups and different trailers. The plate on the truck door is the maximum tire pressure required for the maximum truck rating. The max pressure on the tire is for that tire. I always run max tire rating on the trailers. Same on my heavy highway/construction trucks. I never load the pickup over max tire rating but will lower the pressure for periods when not pulling trailers. If you lower too much the tire pressure sensor will go off. I found that the tire pressure will increase up to 10 psi. (80 to 90 psi) from heat if running long periods loaded at near max tire rating. I found that with nitrogen in the pickup, the pressure increase under the same conditions is about half. Our 40' fifth wheel camper came from the factory with nitrogen in the tires @ 110 psi. Heat is the killer. That's why tires have a lower load rating when used as duals. I run singles. I think tires with some wear run cooler . Heavy lug tires have a lot of rubber and run hot. Can't remember blowing a good tire on the road.
------------- Nothing is impossible if it is properly financed |
Posted By: Bill_MN
Date Posted: 12 Oct 2020 at 4:32pm
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I got E rated Michelins on my F150 about 4 years ago and figured my inflation based on the contact patch. Best way is to do the chalk test- draw a chalk line across the tread in one spot and drive forward over the chalk line, see where the chalk rubbed off or not. Should be even across the tread face then you have even contact with the road across the tread. Adjust accordingly. When you have them properly adjusted there should be the same sidewall squat front and rear. I run mine 50 psi front and 42 psi rear with no load. Add 5-10 lbs to rear if heavier trailer or load in box. Same pressure front and rear on a regular pickup will get you uneven wear as the front has much more weight on it. With a service body it probably evens out. ------------- 1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow |
Posted By: FREEDGUY
Date Posted: 12 Oct 2020 at 5:16pm
E rated tires on a 1/4 ton truck ??
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Posted By: steve(ill)
Date Posted: 12 Oct 2020 at 5:47pm
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The F150 is a 1/2 ton truck........ but the E rated tires is a good example of what we are talking about.. Just because the TIRES can be pumped up to hold MAX LOAD, the TRUCK might not be rated for that kind of load... Thats why using the TIRE MAX PRESSURE is not the best idea. ------------- Like them all, but love the "B"s. |
Posted By: FREEDGUY
Date Posted: 12 Oct 2020 at 5:59pm
They "call" it a 1/2 ton, dare you to look up the specs on a 5 year old "150" vrs. a 15-20 year old "150" . I've been told by several independent shops that the 1-2-3 '50 series have dropped in "hauling/suspension" ratings by "1". A current F 150 has the same "rating" as a Lincoln Navigator  . And I don't recall ever asking about "MAX" pressure in my original post
 ?? The upcoming election has gotten you in a tizzy  |
Posted By: steve(ill)
Date Posted: 12 Oct 2020 at 7:04pm
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call what a 1/2 ton ??? ......... your "independant shop" dont know sh*t. My 7 year old F150 has close to 400 HP, will hold 1800 pounds in the bed and haul a 10,000 trailer ..... What do you call that ?
------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 12 Oct 2020 at 7:06pm
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MAX PRESSURE is what is listed on the TIRE... with the MAX LOAD....... not necessarily what you use on a specific truck. Same tire might fit a 1/2 , 3/4 , 1 ton... all set to DIFFERENT pressure to match the TRUCK. ------------- Like them all, but love the "B"s. |
Posted By: Bill_MN
Date Posted: 12 Oct 2020 at 7:40pm
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I tell you, I actually got the E rated ones by mistake, shop was supposed to just put the P-metric version of same tire on and it had these when I picked it up. I decided they were nice tires and didn't say anything especially since they charged me for the lighter ones....Aside from hauling, the E rated tires look like new yet with over 40,000 miles and had a drywall screw in one once where the screw never made it into the tire, just wore the head off on the road. Shop took the screw out said they didn't even need to seal it as it wasn't leaking. ------------- 1951 WD #78283, 1918 Case 28x50 Thresher #76738, Case Centennial B 2x16 Plow |
Posted By: Tbone95
Date Posted: 13 Oct 2020 at 7:29am
Your very first post/question asked about the sidewall versus the sticker. So asking about MAX pressure is EXACTLY what you did, you just didn't know it. |
Posted By: FREEDGUY
Date Posted: 13 Oct 2020 at 6:31pm
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Thanks for the clarification T, I didn't realize the sidewall psi was "max". As it turns out, the the door well sticker and the side wall psi are 10 psi apart ??
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Posted By: Tbone95
Date Posted: 14 Oct 2020 at 6:42am
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That's a common spread of those two numbers. Assuming the sidewall is the higher! If not that'd be interesting.
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Posted By: jaybmiller
Date Posted: 14 Oct 2020 at 6:49am
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The door sticker numbers are for the ORIGINAL tires from the factory, so ONLY applicable to whatever brand and size and type those were. Change the tires and the sticker spec is no longer valid. ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: truckerfarmer
Date Posted: 14 Oct 2020 at 8:10am
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You beat me to it Jay. I was just gonna say thing. ------------- Looking at the past to see the future. '53 WD, '53 WD45, WD snap coupler field cultivator, #53 plow,'53 HD5B dozer Duct tape.... Can't fix stupidity. But will muffle the sound of it! |
Posted By: steve(ill)
Date Posted: 14 Oct 2020 at 8:44am
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Yes. but even from the FACTORY the numbers dont have to match... We have a FLEX that has tires RATED at 1800 pounds each at 51 psi.... the door sticker says set at 36 psi and 1600 pound load.. No reason to set the tires at MAX 51 psi.... 1800 x 4 = WAY MORE than the GVW of that vehicle..... with factory tires. ------------- Like them all, but love the "B"s. |
Posted By: Tbone95
Date Posted: 14 Oct 2020 at 8:45am
100% agree. |
Posted By: Ken(MI)
Date Posted: 14 Oct 2020 at 11:52am
| One thing being ignored here is the rating of the wheel, all oem wheels have a max load and pressure stamped on them, regardless of what the tire or the truck says, these are do not exceed numbers that usually will coincide with the door sticker of the vehicle. |
Posted By: Brian Jasper co. Ia
Date Posted: 16 Oct 2020 at 8:11pm
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While it may seem like the tire co knows more, the correct answer is go by the door sticker. The manufacturer spends years testing and developing the vehicle to find the best vehicle performance and tire pressure reflects this. The tire co just builds tires to carry a load. Since their tires fit many different vehicles, that's why they have a maximum air pressure. You can put 20 ply tires on a 1/2 ton and air them up to maximum, but that doesn't increase the load capacity of the truck 1 ounce. All you're doing is making your vehicle ride rougher. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: truckerfarmer
Date Posted: 16 Oct 2020 at 11:13pm
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So your saying if the door tag says 50# and the tires say 35#, we should air them to 50#? ------------- Looking at the past to see the future. '53 WD, '53 WD45, WD snap coupler field cultivator, #53 plow,'53 HD5B dozer Duct tape.... Can't fix stupidity. But will muffle the sound of it! |
Posted By: Tbone95
Date Posted: 17 Oct 2020 at 6:56am
| Don’t think he’s saying that, he’s a smart guy and mechanic. Seems if the door says 50 and you bought tires with 35 max you done bought the wrong tires. |
Posted By: FREEDGUY
Date Posted: 17 Oct 2020 at 5:24pm
LMAO !!! That's my take on the "Citiots" version of a P/U, a "LOADED -OUT Ford F150
that "might" have a sectional sofa in the "possibly" 6' bed  |
Posted By: jaybmiller
Date Posted: 17 Oct 2020 at 5:47pm
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The problem with following the door sticker, is that it's for the ORIGINAL tires put onto that truck. More often that not, owners put different tires and rims onto their rides. I'd like a 'straw pole' to see how many put the EXACT same tires on their rides. I know I've NEVER put OEM tires on ANY of my rides when I replaced rubber, not in 50 years. ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: FREEDGUY
Date Posted: 17 Oct 2020 at 6:14pm
Why not ??
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Posted By: steve(ill)
Date Posted: 17 Oct 2020 at 6:43pm
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I dont think i have ever put the "factory" brand of tires back on a truck since 1989... My F250 came with Michelens and got 80K miles on the original tires, so i did that again... You normally put the same SIZE tires back on the truck, but not necessarily the same BRAND. Factory is installing what they bought in BULK and got the BEST DEAL on that year. ------------- Like them all, but love the "B"s. |
Posted By: allischalmerguy
Date Posted: 17 Oct 2020 at 6:48pm
I agree Brian. That is how I have always figured it was also. ------------- It is great being a disciple of Jesus! 1950 WD, 1957 D17...retired in Iowa, |
Posted By: steve(ill)
Date Posted: 17 Oct 2020 at 6:51pm
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Exactly... you always have BETTER rated tires on a vehicle than the door stick says... Would be stupid to put under rated tires on. ------------- Like them all, but love the "B"s. |
Posted By: Tbone95
Date Posted: 17 Oct 2020 at 9:00pm
| Seems as long as the same size, load, and speed range match original, sticker pressure would still be correct. |
Posted By: Brian Jasper co. Ia
Date Posted: 04 Nov 2020 at 2:26am
------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: truckerfarmer
Date Posted: 04 Nov 2020 at 4:28am
I was just using that as an example, that not all tires are created equal. ------------- Looking at the past to see the future. '53 WD, '53 WD45, WD snap coupler field cultivator, #53 plow,'53 HD5B dozer Duct tape.... Can't fix stupidity. But will muffle the sound of it! |
Posted By: Brian Jasper co. Ia
Date Posted: 10 Nov 2020 at 11:54pm
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True, all tires aren’t created equal, but putting heavier tires than the originals doesn’t increase your payload. You’re still carrying the same weight so increasing air pressure only stiffens the ride. ------------- "Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford |
Posted By: Kansas99
Date Posted: 11 Nov 2020 at 6:52am
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First off, what's all this talk about a door sticker, the only one I ever saw says lock/unlock. Secondly, when my sidewalls look too squaty I just add a little air till they look, you know kinda right. Thirdly, who in there right mind would ever waste money on a tire psi gauge, I've been told by more than one person that every gauge reads different. What a waste of money! And lastly, if anyone takes my advice on tires and is as stupid as me then I'm not responsible for the fate of there rubber. ------------- "LET"S GO BRANDON!!" |
Posted By: Tbone95
Date Posted: 11 Nov 2020 at 7:32am
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Posted By: DiyDave
Date Posted: 11 Nov 2020 at 5:53pm
Just remember the valve stem caps are a RIGHT hand thread! ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: jaybmiller
Date Posted: 11 Nov 2020 at 6:26pm
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re:
Just remember the valve stem caps are a RIGHT hand thread! dang, a Chrysler300 I drove had LEFT handed nuts on the left side.. ..wonder what the valve stems were on THOSE tires ????  ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |