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View Full Version : How safe are your tires???



zforce77
12-22-2009, 11:27 PM
Check out this video
http://abcnews.go.com/video/playerIndex?id=4826897

L8 APEX
12-23-2009, 12:35 AM
I always check the date code on my tires.

Another important thing is to check true cold pressure when it gets into the 30-40's. I checked a tire that was inflated to 35psi on a 98 degree day. On a 40 degree day it measured 22 lbs...

Finding a place that fills nitrogen would help lessen this effect.

zforce77
12-23-2009, 11:54 AM
Terry, hit me up I need some work done.

Moonshine
12-23-2009, 02:09 PM
I always check the date code on my tires.


Finding a place that fills nitrogen would help lessen this effect.

+1 on both. In the absence of a nitrogen station I always check mine when we have a significant temperature change. The rule of thumb of 1 PSI per 10 degrees ambient air temp change seems pretty accurate.

WA 2 FST
12-23-2009, 03:48 PM
Yep... properly maintained air pressure is just as important as anything else, I believe...and probably moreso as the tire ages

Mark #2
12-23-2009, 09:08 PM
+1 on both. In the absence of a nitrogen station I always check mine when we have a significant temperature change. The rule of thumb of 1 PSI per 10 degrees ambient air temp change seems pretty accurate.

Agree, Linear, PV=nrT, where V, n, and r are close to constants in the temperature and pressure ranges considered.

Convert to absolute pressure and Celsius or Kelvin and you too can do the calculations.:D

Ohmsby
12-23-2009, 09:58 PM
I just use a gauge :D

Moonshine
12-24-2009, 01:10 PM
and you too can do the calculations.:D

But then what would we need our resident engineer for? ;)

PUMP
12-24-2009, 07:34 PM
Air is about 80% nitrogen to begin with. So, if the oxygen is lost through the permiable material, it would seem that after several refreshers the nitrogen content remaining in a tire would be even higher. If you've had tires for more than a couple of years it should be mostly nitrogen????? I think this nitrogen thing is like Fina's pink air propaganda of 20-years ago - BS to sell a service.

Shiner1
12-28-2009, 05:48 PM
I just use a gauge :D

+1, John sold me some bad tires. These sum-beeches are bald. :rll:

Mark #2
12-29-2009, 08:30 PM
But then what would we need our resident engineer for? ;)

Well like many places in the USA, there is not a need for a resident engineer any longer, so Talon can outsource.

I use the applicable metrology equipment for verification also.;)