Really stupid question for you
Logistics Pro
Joined: Apr 2010
Posts: 4,446
Likes: 25
From: Panama City, FL
My sticker reads 55psi front cold and 80psi rear cold and I have always run with that pressure since I bought the truck and I run 99% empty. I Check my tires on the 1st of every month and/or before a long trip and my tires have stayed at even wear across the whole tire. I stay with the same size tire also. The only time I had a problem with my tires was at 28k and my left rear tread seperated doing 75 on the highway. tore the whole side of my truck up. They were the orginal tires Firestone Steeltex RS tires. I sent the tire to Firestone HQ for evaluation because of a claim so I could get them to pay for all the damages and they came back and said that my tire seperated because it was under inflated which is BS because I keep them at the door psi. After that I bought 4 new BF's and Goodyear tires and never had a problem again. I keep them at door psi and they wear even across the thread.
Senior User
Joined: Sep 2010
Posts: 352
Likes: 0
The best way to gauge "empty" pressure is the chalk test.
Get a piece of chalk (I use my grandaughter's sidewalk chalk) and draw a wide line across the tire tread. Then drive the truck a few feet and see how much of the chalk came off. Adjust your pressure up or down to get as much of the line off as possible.
The quicker way is visually. Let air out until the bulk of the tread looks like it's sitting flat. Then drive it and see if it's too squirrelly.
Get a piece of chalk (I use my grandaughter's sidewalk chalk) and draw a wide line across the tire tread. Then drive the truck a few feet and see how much of the chalk came off. Adjust your pressure up or down to get as much of the line off as possible.
The quicker way is visually. Let air out until the bulk of the tread looks like it's sitting flat. Then drive it and see if it's too squirrelly.
as much of the line off as possible.
the line worn off evenly.
my truck is a reg cab with a 5.4.
i run 55 in the back and 65 in the front.
any more in the back and the outer edges are un-touched.
my experience is that you can actually go a lot higher in the front due to the turning geometry of the twin i-beam suspension i have.
but i run 65 to keep the ride quality.
my tires are BFG Rugged Trail TA in 235-85-16
my last tires were cheap nexen tires that came with the truck and i could go all the way up to 80 and get even tread wear, i guess the tread was much stiffer or something.
in general, i have noticed that BFG tires seem to "Bulge" more than other tires but the quality of the tires are (IMO) un matched for the price.
Senior User
Joined: Nov 2011
Posts: 214
Likes: 0
The tire manufacturer's say to follow the door tag, not what is on the sidewall.
Senior User
Joined: Jan 2008
Posts: 236
Likes: 0
They do, but 65 psi in a tire that says 50psi max is not safe. The tires are probably a "C" rated and OEM tires are "D" rated, therefore, the pressure differences.
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
Do not EVER run more PSI in a tire than it is rated for the sidewall, no matter what the sticker says. That sticker was for OEM equipment only, and unless replacement parts are 100% identical to the OEM tires, then the sticker becomes worthless. If you put D-rated tires on a SD, you cannot fill them up to what the door tag says, because 1) the tires do not meet the specs of the OEM equipment for pressure, and 2) it would exceed the safe maximum PSI of the tire per the manufacturer.
There is absolutely no way around this. The door sticker is only for original equipment or 100% identical conforming replacements.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Senior User
Joined: Nov 2011
Posts: 214
Likes: 0
Do not EVER run more PSI in a tire than it is rated for the sidewall, no matter what thesticker says. That sticker was for OEM equipment only, and unless replacement parts are 100% identical to the OEM tires, then the sticker becomes worthless. If you put D-rated tires on a SD, you cannot fill them up to what the door tag says, because 1) the tires do not meet the specs of the OEM equipment for pressure, and 2) it would exceed the safe maximum PSI of the tire per the manufacturer.
There is absolutely no way around this. The door sticker is only for original equipment or 100% conforming replacements.
There is absolutely no way around this. The door sticker is only for original equipment or 100% conforming replacements.
Superduty trucks come with load range E tires, that is the tire the truck was designed for.
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
Yes, but amazingly, there are D-rated tires (an reference to ply count) with 120+ load ratings (the actual load rating of the tire) that can legally be run on Super Duties. If you decide to replace your OEM tires with non-conforming replacements, the door sticker becomes worthless. Even if the sticker says 75psi, if the tire is maxed at 55psi, do not exceed the sidewall rating.
Senior User
Joined: Nov 2011
Posts: 214
Likes: 0
You're misrepresenting the Michelin website- their page is based on the assumption that P-metric tires are never run at full pressure because of handling and braking/ safety concerns. My car's door sticker says 32psi whereas the sidewall says 51psi; if I fill them up all the way the car rides like a brick and I can lock up all four wheels and defeat the ABS easily.
Do not EVER run more PSI in a tire than it is rated for the sidewall, no matter what the sticker says. That sticker was for OEM equipment only, and unless replacement parts are 100% identical to the OEM tires, then the sticker becomes worthless. If you put D-rated tires on a SD, you cannot fill them up to what the door tag says, because 1) the tires do not meet the specs of the OEM equipment for pressure, and 2) it would exceed the safe maximum PSI of the tire per the manufacturer.
There is absolutely no way around this. The door sticker is only for original equipment or 100% identical conforming replacements.
Do not EVER run more PSI in a tire than it is rated for the sidewall, no matter what the sticker says. That sticker was for OEM equipment only, and unless replacement parts are 100% identical to the OEM tires, then the sticker becomes worthless. If you put D-rated tires on a SD, you cannot fill them up to what the door tag says, because 1) the tires do not meet the specs of the OEM equipment for pressure, and 2) it would exceed the safe maximum PSI of the tire per the manufacturer.
There is absolutely no way around this. The door sticker is only for original equipment or 100% identical conforming replacements.
How To Check Tire Pressure
How to Check Tire Pressure
Tires have been known to lose up to 1psi (pounds per square inch) every month, so check all tires, including your spare, once a month (or before a long trip). It’s easy. Here’s how:
- Purchase a trusted pressure gauge.
- Check your tires “cold” – before you’ve driven or at least three hours after you’ve driven.
- Insert pressure gauge into the valve stem on your tire. (The gauge will “pop” out and show a measured number. When you hear a “pssst” sound, that’s air escaping the tire. The escaping air shouldn’t affect pressure substantially, unless you hold down the air pressure gauge too long.)
- Compare the measured psi to the psi found on the sticker inside the driver’s door of your vehicle or in owner’s manual. DO NOT compare to the psi on your tire’s sidewall.
- If your psi is above the number, let air out until it matches. If below, add air (or have a Michelin retailer help you) until it reaches the proper number
Token Redneck
Joined: Jun 2007
Posts: 9,337
Likes: 346
From: Breckenridge, TX
They don't say anything about overfilling in their faq because every single tire made had this info stamped into the sidewall.
But since you only seem to be able to believe stuff from Michelin's website, here:
LTX M/S2 | Michelin Tires Read the notes for speed ratings over 100mph to the tech specs at the bottom of the page.
But since you only seem to be able to believe stuff from Michelin's website, here:
Originally Posted by Michelin
Inflation pressure increase must not exceed the maximum pressure branded on the tire sidewall.
Laughing Gas
Joined: May 2008
Posts: 939
Likes: 1
From: Central Kansas
Howdy neighbor, I'm in Central Kansas too.
Congrats on the new truck! Bet you never thought there would be such a spirited debate over what you considered a stupid question huh?
But in answer to your question, I run mine at what the sticker says. But your milage my vary. What jmiley can't seem to get through his head is that all trucks aren't kept stock. I'm unoriginal so mine is running the stock tire size and specs, it sounds like yours is as well. It also rides like a lumber wagon unloaded, it's better if the pressure is reduced but the truck isn't my daily driver so I keep them full b/c I'm usually hauling if I'm in the truck. I wouldn't see a problem reducing the pressure to 55-60 to help the ride a bit. I couldn't tell a difference in handling on mine.
Wow. You always do what everyone tells you? Probably never torn off a matress tag either. But seriously, you think Smotrs should run 65psi even though his tires say 50psi max?? That's just stupid and dangerous, thankfully he's smarter than that. His tires aren't what's spec'd from Ford, many aren't. It's dangerous to make blanket statements like yours.
Congrats on the new truck! Bet you never thought there would be such a spirited debate over what you considered a stupid question huh? But in answer to your question, I run mine at what the sticker says. But your milage my vary. What jmiley can't seem to get through his head is that all trucks aren't kept stock. I'm unoriginal so mine is running the stock tire size and specs, it sounds like yours is as well. It also rides like a lumber wagon unloaded, it's better if the pressure is reduced but the truck isn't my daily driver so I keep them full b/c I'm usually hauling if I'm in the truck. I wouldn't see a problem reducing the pressure to 55-60 to help the ride a bit. I couldn't tell a difference in handling on mine.
Wow. You always do what everyone tells you? Probably never torn off a matress tag either. But seriously, you think Smotrs should run 65psi even though his tires say 50psi max?? That's just stupid and dangerous, thankfully he's smarter than that. His tires aren't what's spec'd from Ford, many aren't. It's dangerous to make blanket statements like yours.
Senior User
Joined: Apr 2010
Posts: 345
Likes: 0
From: Taxachusetts
Yikes. Clearly if the tires are only rated to 50 psi you wouldnt put 80 psi in them no matter what ANYONE would say. Ford also claims a certain gwvr, but if you decide to put some small tires with say a 1500# load rating you obviously wouldn't think your gvwr would be the same?
Right?
Thread Starter
|
Freshman User
Joined: Jan 2012
Posts: 31
Likes: 0
Howdy neighbor, I'm in Central Kansas too. Congrats on the new truck! Bet you never thought there would be such a spirited debate over what you considered a stupid question huh?
But in answer to your question, I run mine at what the sticker says. But your milage my vary. What jmiley can't seem to get through his head is that all trucks aren't kept stock. I'm unoriginal so mine is running the stock tire size and specs, it sounds like yours is as well. It also rides like a lumber wagon unloaded, it's better if the pressure is reduced but the truck isn't my daily driver so I keep them full b/c I'm usually hauling if I'm in the truck. I wouldn't see a problem reducing the pressure to 55-60 to help the ride a bit. I couldn't tell a difference in handling on mine.
Wow. You always do what everyone tells you? Probably never torn off a matress tag either. But seriously, you think Smotrs should run 65psi even though his tires say 50psi max?? That's just stupid and dangerous, thankfully he's smarter than that. His tires aren't what's spec'd from Ford, many aren't. It's dangerous to make blanket statements like yours.
Congrats on the new truck! Bet you never thought there would be such a spirited debate over what you considered a stupid question huh? But in answer to your question, I run mine at what the sticker says. But your milage my vary. What jmiley can't seem to get through his head is that all trucks aren't kept stock. I'm unoriginal so mine is running the stock tire size and specs, it sounds like yours is as well. It also rides like a lumber wagon unloaded, it's better if the pressure is reduced but the truck isn't my daily driver so I keep them full b/c I'm usually hauling if I'm in the truck. I wouldn't see a problem reducing the pressure to 55-60 to help the ride a bit. I couldn't tell a difference in handling on mine.
Wow. You always do what everyone tells you? Probably never torn off a matress tag either. But seriously, you think Smotrs should run 65psi even though his tires say 50psi max?? That's just stupid and dangerous, thankfully he's smarter than that. His tires aren't what's spec'd from Ford, many aren't. It's dangerous to make blanket statements like yours.
Talked with a buddy of mine, works for local tire company., he told me not to go over 60psi for running empty, 60psi was his suggestion, he knows me and my "load". I trust him completely. My "load" will be a 3000# trailer with about 300# of tounge weight.
Was running this load with a F150 w/4.6 and was working it to death.
Geuss I went from eitting by to OVERKILL!
Really like the new truck, F250's are soo much more than the old F150!
Dan B.
Central Ks.