Confused about tire pressure
10-09-2015, 10:41 PM
#1
Member
Thread Starter
Confused about tire pressure
What is the right tire pressure? And why?
When I picked up my truck the tires were nitrogen filled at 40psi. I got my first oil change this week and noticed that the tires were reduced to 36psi. 36psi does match the sticker on the door, and is what I have always used in my car tires. But, I keep reading about higher and higher pressures.
When I picked up my truck the tires were nitrogen filled at 40psi. I got my first oil change this week and noticed that the tires were reduced to 36psi. 36psi does match the sticker on the door, and is what I have always used in my car tires. But, I keep reading about higher and higher pressures.
Popular Reply
10-10-2015, 09:01 AM
Two things: 1) you should be using the recommended tire size for your vehicle 2) some vehicles recommend less than optimal air pressure for a better ride but if you deviate from the tire recommendation greater than +/- 10% than you will be risking premature tire failure. So the answer is yes and no. You have to use some common sense when reading what Ford says versus what the sidewalk of your tire says.
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madcap (10-10-2015)
10-09-2015, 10:56 PM
#3
Nitrogen is pretty much a waste if you're paying extra for it. Normal air has 78% Nitrogen content already.
Tire pressures depend on or are affected by many things and what you're doing: terrain, weather, weight the vehicle is carrying/towing.
Tire pressures depend on or are affected by many things and what you're doing: terrain, weather, weight the vehicle is carrying/towing.
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FX4* (10-20-2016),
robotpepper (12-03-2015)
10-09-2015, 10:58 PM
#4
X2 on nitrogen being a waste. And boy do they have people suckered...lol.
My dealer obviously couldn't read the door label and sat mine at 45. I took them down to 32 (no tpms trigger at 32 btw) and it rides about 10 times smoother.
I'd recommend running whatever pressure the door label says.
My dealer obviously couldn't read the door label and sat mine at 45. I took them down to 32 (no tpms trigger at 32 btw) and it rides about 10 times smoother.
I'd recommend running whatever pressure the door label says.
10-10-2015, 12:40 AM
#7
The door sticker is only for when you put on the same size tires. As a general rule smaller tires need more air and larger tires need less air. Google chalk test. It is a good way to find the pressure you need.
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Socal147 (10-10-2015)
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10-10-2015, 07:30 AM
#8
Junior Member
Pure nitrogen is more stable than regular air. Even if regular contains 78% nitrogen. The percentage is relative. The air also contains 21% oxygen, change that to 22% and you might start seeing things spontaneously combust. So a change from 78% to 100% nitrogen is pretty significant. This means when temperatures change your pressure will not fluctuate as much. That being said, I would not pay for it. Nitrogen is pretty cheap but most places charge an arm and a leg for it.
10-10-2015, 07:31 AM
#9
Junior Member
10-10-2015, 08:14 AM
#10
Senior Member
Yea I agree nitrogen is a waist. When I bought the truck I told them I am not paying extra for it. I said you can take it out and put air in for all I care.
I almost was going to rent a tank with 6000PSI and then keep it filled but that would have been for my PCP Airguns. I ended up getting a compressor and some good high pressure side filters and I can fill my two CF bottles to 4500PSI to fill my airguns. I have airguns from 50cal down to .177 and everything between.
When I put the 275 60 20 KO2's on I fill them to about 40psi right now they ride pretty good. When I tow the camper I will probably put more in.
I noticed when Discount Tire installed the tires they only put maybe 35PSI in them and when I pickup up the truck the low tire message was up on the dash.
.
I almost was going to rent a tank with 6000PSI and then keep it filled but that would have been for my PCP Airguns. I ended up getting a compressor and some good high pressure side filters and I can fill my two CF bottles to 4500PSI to fill my airguns. I have airguns from 50cal down to .177 and everything between.
When I put the 275 60 20 KO2's on I fill them to about 40psi right now they ride pretty good. When I tow the camper I will probably put more in.
I noticed when Discount Tire installed the tires they only put maybe 35PSI in them and when I pickup up the truck the low tire message was up on the dash.
.