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Old 05-26-2006, 08:36 PM   #1
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Default Question befor i drive too far....

What does everyone run there tire PSi at?

i go the Nitrogen in them, sooo my presher really wont ever change..
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Old 05-26-2006, 08:37 PM   #2
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32 psi is the recommended amount on my tires. that or 30 pounds I can't remeber.
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Old 05-26-2006, 08:41 PM   #3
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Quote:
Originally Posted by OLDsman105
32 psi is the recommended amount on my tires. that or 30 pounds I can't remeber.
you cant go by what the tires say, you must test because every car doesn't have the same wight
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Old 05-26-2006, 08:43 PM   #4
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i go with 35, perfer stiffer tires for better gas mileage
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Old 05-26-2006, 08:49 PM   #5
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Quote:
Originally Posted by bandit
Quote:
Originally Posted by OLDsman105
32 psi is the recommended amount on my tires. that or 30 pounds I can't remeber.
you cant go by what the tires say, you must test because every car doesn't have the same wight
thats why there is an owners manual and a sticker in your door jam that tells you what your car is supposed to have for tire pressure
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Old 05-26-2006, 09:05 PM   #6
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What'* the deal with nitrogen filled tires? The cold inflation pressure specs are inside the driver door like previously stated. Maximum inflation pressure usually on tire sidewall. N2 can leak just as well as plain old air. 80% of the earths atmosphere is N2, isn't it? I don't get it. Esplain, Lucy
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Old 05-26-2006, 09:14 PM   #7
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Quote:
Originally Posted by markwb
What'* the deal with nitrogen filled tires? The cold inflation pressure specs are inside the driver door like previously stated. Maximum inflation pressure usually on tire sidewall. N2 can leak just as well as plain old air. 80% of the earths atmosphere is N2, isn't it? I don't get it. Esplain, Lucy
heres some infor on the N2
http://dunntire.com/InflationFuelSystem/
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Old 05-26-2006, 09:25 PM   #8
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Old 05-26-2006, 09:26 PM   #9
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ok, so if the air we breathe is 78% nitrogen, then after X period of time, the smaller molecules, 22% (for the sake of argument) will leak out before the nitrogen, correct?

to keep things simple lets imagine that there are 100 air molecules in the tire, 22 of which are non-nitrogen that will leak out faster

this leaves the tire 78% inflated

a properly maintained vehicle will have the tires checked and filled regulary, so that the tire will get topped off with another 22 molecules to fill the void left by the assumed smaller than nitrogen molecules, with my calculations this would add roughly 17 nitrogen molecules and 5 misc others. thus after one tire pressure check and refill, the tire will contain the origional 78 molecules plus the new 17, totalling 95, or 95% nitrogen

this 95% is probably just as much as a tire filled with nitrogen will have due to the initial space in the tire filled with ambient air before inflation.

Therefore, i hope no one pays extra for something that can be accomplished through one pressure top-off
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Old 05-26-2006, 09:31 PM   #10
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Quote:
Originally Posted by toastedoats
ok, so if the air we breathe is 78% nitrogen, then after X period of time, the smaller molecules, 22% (for the sake of argument) will leak out before the nitrogen, correct?

to keep things simple lets imagine that there are 100 air molecules in the tire, 22 of which are non-nitrogen that will leak out faster

this leaves the tire 78% inflated

a properly maintained vehicle will have the tires checked and filled regulary, so that the tire will get topped off with another 22 molecules to fill the void left by the assumed smaller than nitrogen molecules, with my calculations this would add roughly 17 nitrogen molecules and 5 misc others. thus after one tire pressure check and refill, the tire will contain the origional 78 molecules plus the new 17, totalling 95, or 95% nitrogen

this 95% is probably just as much as a tire filled with nitrogen will have due to the initial space in the tire filled with ambient air before inflation.

Therefore, i hope no one pays extra for something that can be accomplished through one pressure top-off
nope didn't pay any more, every person that gose to Dunn Tire will get ti included in the price for FREE, they didn't rase there prices either.
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