Truck Guru's

[akley88]

I run 65psi in my truck. It's higher but the tires can handle it, and i get more mpg. 32 is to low any way you cut it, especially for a truck.

that depends on the tire. most manufactures should have a load chart for various PSI. the tires i have on my truck, falkens, have a load rating of 2395lbs at 30 psi, 2680lbs at 35 psi. i could run my truck at 35 psi if i wanted for daily driving. their full load rating at 65 psi is 3970 lbs, which is what i run them at

[Curmudgeon]

My truck is a 2014 4-door, 4wd, 1/2 ton pickup. Ram calls for 39 PSI in the tires.
The truck weighs something in the neighborhood of 4,000 to 4500 pounds.

Start with door sticker, then do the chalk test.

[arjohnson]

This is generally true if the tires on the truck are the same size and rating that the
manufacturer states. The OP's truck has apparently been modified and the tire's max
PSI is no longer a valid specification for his truck.

Regardless if tires were changed it will still have it on the tire. Different type tires require more pressure. Mine are LT tires that call for 80#max. I run 70 in rear and 50 in fronts.

Tires with a lot of sidewall usually run less air like 35x12.50x15 can run 30 or so.

Most vehicles today are running 20-22* rims with less sidewall and require max or close to max pressure.

[akley88]

Didn't the door sticker on all those rolled over fords from a few years ago have the incorrect pressure on them?

that was part of the issue. ford and firestone agreed that lower the psi fixed the handling issue the explorer was having. that caused premature failure, however Firestone knew there was an issue and even supposedly ramped up production to try and decrease the percentage of occurance. one plant in particular had 10 times more complaints. that was blamed on the strike that occurred in 94-95 and the age of the building which allowed to high of humidity and the glues in the tires wouldnt bond correctly. the equipment age at the plant was also blamed. the NHTSA eventfully found firestone at fault and they had to pay ford 240 million.

[Curmudgeon]

Regardless if tires were changed it will still have it on the tire. Different type tires require more pressure. Mine are LT tires that call for 80#max. I run 70 in rear and 50 in fronts.

Tires with a lot of sidewall usually run less air like 35x12.50x15 can run 30 or so.

Most vehicles today are running 20-22* rims with less sidewall and require max or close to max pressure.

I hope your tires are wearing evenly. Try the chalk test, then talk.
My truck has P275/60R-20 (factory size), Falken Wildpeak tires that
are both All Terrain and All Season. They get the 39 PSI from the sticker
and my tread wear is always even.
It's not economics it's safety. I would not inflate to anything over the recommendation
for the truck weight and GVWR.

The tire manufacturer is assuming the tire has been installed on the proper vehicle and
no mods have been made.

[arjohnson]

I hope your tires are wearing evenly. Try the chalk test, then talk.
My truck has P275/60R-20 (factory size), Falken Wildpeak tires that
are both All Terrain and All Season. They get the 39 PSI from the sticker
and my tread wear is always even.
It's not economics it's safety. I would not inflate to anything over the recommendation
for the truck weight and GVWR.

The tire manufacturer is assuming the tire has been installed on the proper vehicle and
no mods have been made.

It all depends on the tire, vehicle, mine is a one ton that requires LT tires. Your tires are P rated so the tire pressure will be lower. If he has LT tires the pressure will have to be higher, and that*s also for safety reasons.

[Curmudgeon]

It all depends on the tire, vehicle, mine is a one ton that requires LT tires. Your tires are P rated so the tire pressure will be lower. If he has LT tires the pressure will have to be higher, and that*s also for safety reasons.

Yes and the door jamb sticker will reflect that difference, as has already been stated back in
post #2.
Do you have these details about his truck? I don't see where he posted them.

[arjohnson]

And from what it sounds like his tires are probably LT and not P rated tires. If 70 is max pressure and he’s not hauling he can run less than max but definitely not 32 psi, maybe around 50. Again depends on tire.

[arjohnson]

Yes and the door jamb sticker will reflect that difference, as has already been stated back in
post #2.
Do you have these details about his truck? I don't see where he posted them.

The door jamb sticker doesn*t mean anything with aftermarket tires, but the tire itself does, it will give you max pressure but as stated you don*t have to run max, you can run them lower depending on the vehicle and what you*re doing with it.

[Curmudgeon]

And from what it sounds like his tires are probably LT and not P rated tires. If 70 is max pressure and he*s not hauling he can run less than max but definitely not 32 psi, maybe around 50. Again depends on tire.

Suddenly I can agree with about half of what you posted above. There is still too much
the OP hasn't told us, and we are all assuming. More info about the truck and tires would
help a great deal. Until then...