50psi ok on stock wheels?

Just keep putting airing up till something gives and make a note of the safe limit, kaboom!!!

 

The E rated tires are stiffer than the factory P rated tires. You need to run LESS PSI in them to accomplish the same thing. 50 PSI is about right for an unloaded 3/4 ton truck, way too much for even a 1/2 ton. E series tires are stamped for 80 PSI for heavy loads and 80 PSI might well damage your wheels. I doubt 50 PSI will hurt anything, but you just don't need it. If anything you'll wear out the center of the tires prematurely.


The door jamb says 29-32 PSI for factory P series tires. The stamp on the tires say 44 PSI for heavy loads with P series. I always ran closer to 40 PSI with P series tires. That way I didn't have to stop and air up every time I put a load in the bed or pulled a trailer. It added about 2 mpg and I still got 55,000-60,000 miles out of my tires.

When I went to E series tires they put 50 PSI in at the tire store, which is way too much for the Tacoma. After some experimenting I've settled on about 32 PSI. The ride is comparable to P series tires with 40 PSI in them and they will still carry more weight than the P series tires @ 44 PSI. Either will carry far more weight than the Tacoma is rated for.

 

Is it the same? Running 50psi in my tires for a short while did them no harm that I can tell. Already posts in this thread that seem to contradict that logic. You probably know more about tires than analogies. I don’t know much about tires- just asking questions...

 

Makes sense to me that these tires are stiffer than p range tires and less pressure is a smoother ride. When they were at 50 they certainly felt stiff. 40 doesn’t feel bad so far, but I like a firmer ride. I am interested in the sweet spot for wear and mileage which I will certainly find sometime soon. Not that moved by the theory that inflating my tires at 10 over the sticker represents negligence were I to get in an accident

 

The sensors can be set to pretty much any pressure over (I think) 20 psi. They can handle the 80 psi listed on the side wall of the tires. The wheels can also handle higher pressure than you will put in the tire.

You won't break anything. The chalk test is really the best measure for even tire wear. Don't worry about getting too exact and running different pressures in each corner - each tire actually carries a different amount of weight. Just find a happy medium and rotate your tires every oil change. Rotating regularly will average out the differences in wear.

And for the record. I run both 235/85/16 and 255/85/16 load E tires right now. I run both at 40 psi for normal driving.

 

Quoting laws from the most oppressive state in the union won’t win people over

 

Oh lawd...no ,air down 35 psi is fine

 

Proper tire pressure is a function of contact patch area and weight but there's lots of room to fudge. If you've added more weight to the vehicle, then the door jamb numbers are probably too low. If not, then the door jamb numbers are probably right.

If you add more pressure anyway, you're probably rattling out your fillings for nothing. Modern radial tire wear isn't as super dependent on pressure as they once were.

 

The point is that not only does it waste my time and the time of every other individual having to go through this, and the moral of the whole thing is to stick to the recommended psi as per the door jambs to maximize both tire life and to prevent unnecessary premature maintenance. It only costs you more money in the end in a past time that historically is one of the most expensive things to do.

That being said, if you are increasing load weight, the rules here do not apply as you must increase the pressures to compensate for the amount of additional weight you are introducing onto the vehicle chassis.

 

I don’t have much of a load now, but I do have a topper with a reinforced top that is ~250. A roof rack that is about 50lbs, a couple hundred lbs of junk and/ or a couple adult passengers at any given time.

Also, later this week I will be moving around about 1500 lbs of laminate flooring. I also have a small trailer that can occasionally end up with a motorcycle, dresser, or some other junk that could weigh 1000-1500lbs.

The moral of the story seems to be that there are some advantages of understanding With your individual needs how and your tires behave with different loads, what is recommended, what others peoples experience has been.

Just filled up and got 234mi for 14.3gal of gas- 16.3mpg on a tank that was almost all highway. This is up from 15mpg from previous tanks where I am only going to from work- stop lights and 40mph. Part of the reason I wanted to up pressure was to see how it would impact fuel economy. Have been doing a lot of little things in maintenance to the truck, but fuel economy has always been super low compared to my 08 4Runner.

I have spent so many hours on TW and yet is had never occurred to me I was wasting anyone’s time but my own.

 

I'm talking about the law and how it wastes everyone's time who it affects when they have to air down crazy high air pressures. That last statement was not directed towards you or anyone who is not immediately invested in the automotive repair industry in the state of California.

Anywho, welcome to TW OP. Hang around, this place is a ball for obtaining information and general BSery.

 

happy medium would be 30-32 psi but that depends on your weight. what is the need for 50, how much are you hauling?

 

Ahh, my mistake. I misread you to mean that the question in this thread was too repetitive too be useful

Thanks- I enjoy the general BSery and the useful info provided here.

I have backed off to 38psi and plan to monitor that for a tank and see what my mpg is. At that point I will be ready for an oil change and a tire rotation.

 

When I tow, it won’t be much (1000-3000max right now) and I only have 300-500 lbs of other extras in there at any given time. I think the e range are probably overkill for me, but as I said, I just discovered they were what was on the truck when I bought it recently. I plan to drive them til they wear out, because I don’t want to spend the money on another tire, but also not too enthused about paying for the extra mpg.

If anyone wants to trade for a newish set of e range tires, that could be a thing.


On my 4Runner, I had a tire of very similar diameter, but in P range, and they were much more like car tires I have owned and maintained in the past (40ish max psi adjust based on ride, mpg, monitor accordingly). I wanted to be on the high pressure side of safe driving and it sounds like that is ~40ish lbs based on the weight of our truck. Will probably end up somewhere in the 32-36 range when I figure out best mpg I can squeeze out. So, one might argue that I was better off never having changed the pressure what do you know...

 

Wasn't the original question about why the TPMS was triggered? Most TPMS systems look at differences between tires, and trigger when one is lower than the others by some percent. That includes the spare. If you aired up everything but the spare, then that is likely the cause

 

The District of Columbia is not a state.

 

They were correct to begin with. 30-32

 

The door jam sticker is only relevant when you have stock size and load rated tires. LT tires require higher pressures, and if you have changed the size that’s a factor as well. When I went to BFG KO2s LT 265/70-17 load C I contacted BFG and they recommended 45 PSI in the front and 50 PSI rear.


01/04/2016

Hello Jeremy,

Thank you for your response.



Based on the information that you have provided, we would recommend for the air pressure for you BFGoodrich All-Terrain T/A KO 2 tires to be 45psi in the front and 50 psi in the rear.


We appreciate your business and thank you for choosing BFGoodrich.

Sincerely,

Audrey
Consumer Care Department
Certified BFGoodrich Product Expert

 

Jeremy,

What kind of weight you running over stock?

 

Not quite. The number on the side is more or less the max operating psi. Most diesel trucks recommend 80psi in the rear. If that was the actual max of an e rated tire before blowing a bead there would be some issues. I've seen tires with over 200 psi in them because customers thought "it would just stop taking air when its full"