YACT: Tire Pressure...

[Gamingphreek]

Filling up the air in my truck yesterday, my Dad and I had to look on the tire sidewall. We have non-stock 31.5x10x15 so I couldn't look on the panel inside the driver side door.

On the tire wall though it said Max load: 3050(?)lbs at 50 psi. Both him and I have never heard of a Light Truck tire (or any car tire for that matter) being inflated to 50 psi. So to be safe we inflated them to 45 psi.

Could 50 PSI be correct....I am just hesitant to inflate a tire with that much air.

-Kevin

 

[PHiuR]

That's the max psi, but might not be recommended. The recommended could be 35psi.

 

[HaxorNubcake]

are you planning on having "max load"?

that seems really high but I dunno

 

[IronWing]

Email the tire manufacturer with your truck model, specs and ask. BFGoodrich for one, will tell you the ideal for each vehicle.

 

[Gamingphreek]

Well on the inner panel of the driver side door it has 2 different passenger tire sizes with 26 psi and 35 psi ratings. Since we have over sized (slightly) Light Truck A/T tires I figured that we couldn't trust the manufacturers recommendation. Was I wrong in that assumption?

-Kevin

 

[Pepsi90919]

i believe 35psi is the normal and 26psi is the spare?

 

[Heisenberg]

I wouldn't inflate them to 45 psi. Even if you have slightly oversized tires, the pressure in the door panel is most likely still correct.

 

[Gamingphreek]

Crap....so should I got let some of the air out or should I just leave it. I filled it when the tires were still warm so the cool air should have brought it down to around 42 or so I would think.

-Kevin

Edit: Also you don't think I run the risk of one of the tires blowing out or anything do you?

 

[funboy6942]

Different truck tires are made differently, some with thicker sidewalls require more air pressure. Whats on your door is rated for the stock whimpy side wall tires that came with the truck. 7 ply sidewalls had a max of 65-90 (depending on the tire) psi. Semi truck tires take over 100+ psi. So I would look at the side wall of the tire since you have changed them and do a lb or two lower on the air and track how the tread is wearing on it. But if it says 45max (or what ever the max) I would start with as close to the max as you can, lower then needed psi will give you worse mpg and wear out the outer edges of the tire, over inflated will give you better mpg but will wear out the center rubber of the tire, but it would have to be really overinflated to do that, like 15lb or more over inflated.

BTW worked for goodyear, if the tires are not stock then whats on the door does NOT pertain to any other tires you install on the vehicle. Strictly for stock size/brand tires only.

OH and BTW 2:
You run a higher risk of your tires blowing out because they are under inflated. Under inflation causes more rubber to the road, which increases friction between the rubber and the road, causing you to get the worse MPG, and heat up the tires sometime to point they blow out. Over inflation by a few lbs will do absolutly nothing more then give you better MPG, handling, and cause the center rubber of your tires to wear faster the the outer part, unless you really dumb and put 80 psi in a 35max rated tire then yes one good pot hole and it will blow out. But yours are maxed at 50psi loaded so no your not at any risk at all if that is indeed whats written on the tire.

 

[Pepsi90919]

Originally posted by: Gamingphreek
Crap....so should I got let some of the air out or should I just leave it. I filled it when the tires were still warm so the cool air should have brought it down to around 42 or so I would think.

-Kevin

Edit: Also you don't think I run the risk of one of the tires blowing out or anything do you?

anything in the 40s is too high for me. i'm trying to remember what my S10 specified but i'm drawing a blank...maybe 35

 

[funboy6942]

Originally posted by: Pepsi90919

Originally posted by: Gamingphreek
Crap....so should I got let some of the air out or should I just leave it. I filled it when the tires were still warm so the cool air should have brought it down to around 42 or so I would think.

-Kevin

Edit: Also you don't think I run the risk of one of the tires blowing out or anything do you?

anything in the 40s is too high for me. i'm trying to remember what my S10 specified but i'm drawing a blank...maybe 35

You guys, all tires are different, especially when it comes to truck tires and low profile street tires. If you have stock tires go by whats in the owners manual. If not stock go by whats written on the tire as max and then down it a few lbs and your fine.

 

[Journer]

my tires are 45psi....i keep em at 45

 

[Kalvin00]

what kinda truck are we talking?

edit: a light truck like a tacoma, 45 is way too much. you're going to get a very harsh ride, especially on dirt roads at that psi. if i remember, i usually set the fronts in my tacoma to 35 and the rear at 32.

 

[chuckywang]

Originally posted by: Gamingphreek
Filling up the air in my truck yesterday, my Dad and I had to look on the tire sidewall. We have non-stock 31.5x10x15 so I couldn't look on the panel inside the driver side door.

On the tire wall though it said Max load: 3050(?)lbs at 50 psi. Both him and I have never heard of a Light Truck tire (or any car tire for that matter) being inflated to 50 psi. So to be safe we inflated them to 45 psi.

Could 50 PSI be correct....I am just hesitant to inflate a tire with that much air.

-Kevin

That's the max psi. The recommended psi would be written on a sticker on the part of your car where the door slams into the frame. Just look around there for the sticker.

 

[Pepsi90919]

nvm

 

[TheSlamma]

Originally posted by: chuckywang

Originally posted by: Gamingphreek
Filling up the air in my truck yesterday, my Dad and I had to look on the tire sidewall. We have non-stock 31.5x10x15 so I couldn't look on the panel inside the driver side door.

On the tire wall though it said Max load: 3050(?)lbs at 50 psi. Both him and I have never heard of a Light Truck tire (or any car tire for that matter) being inflated to 50 psi. So to be safe we inflated them to 45 psi.

Could 50 PSI be correct....I am just hesitant to inflate a tire with that much air.

-Kevin

That's the max psi. The recommended psi would be written on a sticker on the part of your car where the door slams into the frame. Just look around there for the sticker.

Yep... and I'm sure 50 is overinflated for your truck

Most vehicles sit between 30-35

 

[funboy6942]

OMG :disgust:

 

[jemcam]

Don't exceed what's on the sidewall.

 

[FeuerFrei]

Originally posted by: jemcam
Don't exceed what's on the sidewall.

Funny you should say that. Mine say 35psi-max, but this one time I was just eyeballing the tire shape because I didn't have a gauge with me and ended up inflating to 72 psi. I began hearing this droning noise when rolling at low speeds and, not knowing what it could be, eventually look it in to the dealer a week or so later. I was pretty impressed and a bit embarrassed when the dealer told me how overinflated they were.

 

[SVT Cobra]

I thought most knew that the PSI on the tire was the tire's max PSI, and really would never be inflated to that point. I would say 35 for your truck.

 

[fstime]

Do whatever the owners manual says to.

Don't go by what the tire spec says.

 

[SVT Cobra]

Originally posted by: FeuerFrei

Originally posted by: jemcam
Don't exceed what's on the sidewall.

Funny you should say that. Mine say 35psi-max, but this one time I was just eyeballing the tire shape because I didn't have a gauge with me and ended up inflating to 72 psi. I began hearing this droning noise when rolling at low speeds and, not knowing what it could be, eventually look it in to the dealer a week or so later. I was pretty impressed and a bit embarrassed when the dealer told me how overinflated they were.

WOW 72 :Q

 

[funboy6942]

OK here dammit, so in case you don't wish to listen to me on why your better off with a slightly overinflated tire or at its max then guessing at it and going slightly under inflated.

 

[Gamingphreek]

Ok well Ill try to keep it around 40 then I guess.

As I said earlier, I don't think going by the sticker would be accurate as I am using Non-Stock, slightly larger LT tires.

(Car is a 1992 Toyota 4x4 Pickup (Tacoma's Predecessor).

At any rate thank you everyone for the input. I'll definitely call (I think BFGoodrich makes the tires I have on there) and see what they recommend. Ill let you guys know.

Thanks,
-Kevin

 

[OrganizedChaos]

someone get this guy a piece of chaulk.