Tire Pressure is suppose to be...

[Zotman]

FWIW, the Mexican Michelins on my Lariat have a max pressure rating of only 44 psi.

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[Johnkn]

I left 35 psi in the fronts since all traction for me is from the front.

False...


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[GPSMan]

False...


.

All forward traction (and ~70% of stopping traction).

So damn literal!

 

[Edge Haley]

its crazy - mine came from factory with 41, first thing I did was lower them to 35

My Maverick arrived with from 45 to 51 PSI - dealer admitted it was their fault…when mavericks are prepped to be put on a train they put 45-52 psi in the tires at the factory to reduce bounce during transport with axels strapped down…my dealer said their tech guy missed that delivery step on the check-list in reducing tire pressure. After 100 miles and a rough ride from my pickup I stopped, checked the tire press and fixed the air pressure, wasn't a big deal. But 51 PSI in both rear tires made for a rough ride.

Have bought and shipped several cars from Germany (via ship) and they too arrived with very high tire psi…supposedly protects suspension and keeps straps/chains better attached.

 

[GPSMan]

FWIW, the Mexican Michelins on my Lariat have a max pressure rating of only 44 psi.

Then you should go by that.
Interesting the XLT has higher rated tires. 51 psi on mine.

 

[LM42]

I have Wildpeak AT

3. 235/65/17 on my XLT Hybrid 32 psi cold 35 PSI when hot . 8000 miles rotated at 5000 been From Tn to Ca no problem .

Is this the A/T Trail?

 

[LM42]

Not likely, proven.
35 psi is pretty darn squishy.
50 psi is a safe upper limit for the XLT stock tire.
You'll feel more bumps, and some say continued use can create more rattles in the car/truck. So there can be a down side. But it's absolutely safe for the tires.

Ask any commercial delivery person.
Ask any police or highway patrol person. Don't necessarily ask your dealer.

Every tire on every vehicle owned over the past 30 years has exceeded the tread life rating on my tires which I run a little firm for additional MPG.

Your car advice is to ask police or delivery people, but not the dealer? This is why when service clients come to me with "I read on a forum" I just go ahead and punch myself in the balls.

 

[GPSMan]

Your car advice is to ask police or delivery people, but not the dealer? This is why when service clients come to me with "I read on a forum" I just go ahead and punch myself in the balls.

You're pretty funny!

Yes. Of course! Ask any fleet owner about tire inflation. Like fleets of delivery vans or highway patrol cars.

Most if not all inflate to higher than door jam sticker. They care more about tread life and performance than comfort. The sticker is the middle ground of all aspects so it's average" pressure for the "average" driver.

 

[LM42]

You're pretty funny!

Yes. Of course! Ask any fleet owner about tire inflation. Like fleets of delivery vans or highway patrol cars.

Most if not all inflate to higher than door jam sticker. They care more about tread life and performance than comfort. The sticker is the middle ground of all aspects so it's average" pressure for the "average" driver.

It is not average for the average driver. It is what the auto and tire manufacturer have agreed is the best pressure for that tire on that vehicle after testing. Over inflating does not equate better performance. It may not even equate better tire life. I started racing cars in high school and moved on to road racing motorcycles and motocross and now race mountain bikes. Tire pressure is absolutely critical to performance and people should not arbitrarily just make up their own numbers. That doesn't mean you will suddenly have a blow out or poor performance. But I am sure most in here do not know what is better for their cars than the people that designed them.

 

[Johnkn]

Your car advice is to ask police or delivery people, but not the dealer? This is why when service clients come to me with "I read on a forum" I just go ahead and punch myself in the balls.

He just makes stuff up and posts it, every thread! Every day.....

“Ask the police”. LOLLLLLLLLLLLLLLLLLLL


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[GPSMan]

Because I'm old enough to know a thing or two because I've seen a thing or two.

I'd start posting links if it would get some youngins to STFU but I don't think they would.

 

[OleFordGuy]

According to Michelin (mfg of the tires on my Mav), they say use what's recommended on the vehicle mfg sticker and noted: "Do not use the number on your tire’s sidewall, as this does not indicate the pressure needed in your tire"
https://www.michelinman.com/auto/auto-tips-and-advice/tire-maintenance/routine-tire-care-tips

 

[Johnkn]

Because I'm old enough to know a thing or two because I've seen a thing or two.

I'd start posting links if it would get some youngins to STFU but I don't think they would.

Thanks for the laugh...

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[Art Vandelay]

Not likely, proven.
35 psi is pretty darn squishy.
50 psi is a safe upper limit for the XLT stock tire.
You'll feel more bumps, and some say continued use can create more rattles in the car/truck. So there can be a down side. But it's absolutely safe for the tires.

This does not constitute grossly over-inflated, just constitutes maximum inflation.

Ask any commercial delivery person.
Ask any police or highway patrol person. Don't necessarily ask your dealer.

Every tire on every vehicle owned over the past 30 years has exceeded the tread life rating on my tires which I run a little firm for additional MPG.

Please don't listen to any of this, this is TERRIBLE advice! See below.

Your car advice is to ask police or delivery people, but not the dealer? This is why when service clients come to me with "I read on a forum" I just go ahead and punch myself in the balls.

I mean.. seriously! It's scary enough that so many people don't know the maximum inflation on the tire sidewall is not the correct pressure on any vehicle. Then people see things like this on the internet. His advice is just as bad as someone saying "inflate your tire to 15 PSI so the ride will be more comfortable. Because what? The car manufacturers just throw out arbitrary numbers for recommended tire pressure?

 

[GPSMan]

Tirereview..com

Michelin performed a hydroplaning resistance test using pressures above the “max pressure/max load” rating. The test was motivated by the common practice among law enforcement officers of inflating their tires above that recommended by the vehicle manufacturer. The test almost doubled the “max pressure” without discovering where hydroplaning resistance reached a plateau.
Conversely, a 5 psi drop below the manufacturer’s recommended pressure showed a notable reduction in the tire’s ability to disperse with deep water. Also, multiple tests with “people-off-the-street” revealed that pretty much everyone can notice a difference in wet handling between tires set to the manufacturer’s recommendations and those set to just ABOVE the threshold for a warning from the TPMS.
(Pardon my repetition: The “max pressure/max load” number on the sidewall has NOTHING to do with the burst pressure of the tire. That number indicates where adding more air pressure will not allow the tire to carry additional weight. The burst pressure is a shockingly high multiple of the “max pressure.”)"

Furthermore:
"Can we improve handling and ultimate grip by increasing tire pressure? You bet! In race-track-style pressure tests we found that increasing the pressure on the end with less grip worked wonders. If the front tires lost grip first, adding front pressure and reducing rear pressure allowed an expert driver to get around corners faster. (Just to make things clear: This was on a test track and the goal was to make the car go around corners much faster than would make sense on public roads.)"

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