Question by quepasameng: Tire pressure questions?
My tires were filled with nitrogen. I had driven the car around for about 20 minutes before i topped it off with air. “With the tires Hot” i filled the tires to 35psi they are max rated at 44psi. If the tires were hot at 35psi what should i expect a cold reading to look like. One tire was around 26PSI. I accidentally let out to much air. Is the car safe to drive like this?
I am freaking out because these are expensive tires, and i think i overinflated the tires and under inflated one, while letting out expensive nitrogen.
Door Jamb says 35 front & back
The tires were all around 30 before i touched them.
Best answer:
Answer by MK3SupraMan
check the tires once the car has cooled, over inflating just causes sheity handling and
when u go over bumps u really feel them, underinflating is a lagging car,and tire wear,
over inflating has tire wear to along the middle as low tires is the edges. nothing bad
its not like u blew them up but for my max 51 psi tires i only inflate to 35. your not suppsed
to go near the max, unless your towing or drifting. check your tires when their cold, and fill it
at 34 cold. check your door jam, and glovebox, has manufactures recomended pressure.
What do you think? Answer below!
Please read other answers to this question at the very bottom of this page, below you will find a video and related articles that will try to answer the question, if you have a proper answer please post it at the bottom.
car Tire Air Compressors & Inflators 01…Viair 00073 70P Heavy Duty Portable Compressor www.amazon.com 02..VIAIR 85P Portable Air Compressor www.amazon.com 03…Q Industries HV35 SuperFlow 12-Volt 140 PSI Air Compressor www.amazon.com 04..EZ – Air Tire Gauge www.amazon.com…
Posted in 
You can drive with that tire at 26psi but your fuel mileage will go down and the tire will cup out on the treads which means the outer tread will wear faster then the center. you will find out if you run the tires at 40psi they will wear better and fuel millage will go up. check the tires for pressure they will tell you what to run.. and like i said 40 is OK to run i run 40 psi on my car tires my truck runs 60 psi. nitrogen is a dry air has no water in it air like the pumps have at 7-11 will small amounts of water in them depends on how much is in the air.
the whole perpose for nitrogean filled tires is that the pressure doesnt go up or down with the abient air temp, but your not supposed to top them off with regular air it defets the purpose of having nitrogean.
The tire pressure should be what the manufacturer placed on the sticker on the driver’s side pillar (just behind the driver). That is what you should use for the best ride. Tire pressures molded into the tire are maximum ratings.
There’s about a 4-5 psi difference between hot and cold passenger car and light truck tires.
You can drive for short distances at 26 psi. But correct the inflation pressure as soon as practical.
Don’t waste your money on nitrogen filled tires.
Air is about 79% nitrogen anyway.
Since you drive most of the time with the tires “hot” then check the pressure with them hot and don’t touch them afterwards. You should take it easy the first few miles you drive in your car when it is “cold” and until it “warms up.” But it is safe to drive for a small period at 26psi.
If you needed to top off any tire after 20 minutes, you’ve got a leak. That, or the tire wasn’t set to proper PSi to begin with. As far as safety, if the tire isn’t flat or over-inflated, you can drive it. Its you’re wallet thats in danger, because impropper tire pressure will cause you to fly through tires due to premature and uneven wear. Standard passenger car, you should have your tires set to between 32-34 PSi. Open your driver’s side door, and there is a sticker on the door itself or the body that has your tire pressure specifications for each individual tire.
Nifty fun fact: it also has a rating for your spare, and from that pressure rating, you can tell whether or not you have a full sized spare.
Once you set your air pressure, keep and eye on whichever tire you had to “top off”. If it starts losing air faster than the others, you’ve got a elak.
Tire pressure decreases about 1psi for a 10degree drop. So you should see no more than 3 psi for your tire, if it’s not leaking. 35psi is too high for most tires, check your door label, it should be more like 30-32 cold.