# tire pressure: does this exist?

**URL:** https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259
**Category:** NYSpeed Automotive
**Created:** [October 19, 2007, 11:20am UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259 "2007-10-19T11:20:00Z")
**Posts on this page:** 1
**Showing post:** 45

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### Author: ![Fry](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/fry/32/7284_2.png) [@Fry](https://forums.speedlife.net/u/Fry)
#### Post date: [October 23, 2007, 7:25pm UTC](https://forums.speedlife.net/t/tire-pressure-does-this-exist/37259/45 "2007-10-23T19:25:48Z")

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[quote=“cdvma,post:35,topic:37259"”]

Yea the local places that do fills usually charge an arm for what you get and its never pure enough nitrogen. There is always moisture in there

[/quote]

Unless the gas got contaminated, there shouldn’t be any moisture, as in dewpoints below -50\*F. Granted the quicky lube’s evacuating/purging/filling procedures might not be the greatest…

But not having any moisture is the whole benefit. Who cares if you have 78% nitrogen (air) or 99% nitrogen, right? It’s the water vapor that’s doing most of the expanding.

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