Originally Posted by perryg114
Barry what is the max temp reading we should get on a bias ply or radial tire before things start coming apart? If the tire is of substandard quality will controlling temperatures and keeping pressure at the right levels matter?
Purely empirical data from this sight and others is telling folks to stay away from ST tires radial or bias ply.
This is mostly a time vs temperature thing - Arrhenius'
s Rule: A reaction rate doubles for every 10įC. So the material properties degrade over time and the higher the temperature, the faster the degradation.
The industry uses a rule of thumb that the inflation pressure increase should be no more than 10%, and with 15% increase some action needs to take place - typically more pressure.
Controlling temperatures? Anything that reduces the stress is a step in the right direction. In tires, that would reduce the temperature build up and the pressure buildup. Is that a way to guarrantee no failures? No! But it will reduce the rate and extend the time before failure.
Oh, and I hope you won't mind my quibbling, but "empircal" means experimentation or observation. I think you mean "anecdotal".
And don't get me wrong, it is clear there are issues with ST tires, the question is what is the cause.
Originally Posted by w7ts
I checked out Barry's web site and bookmarked it.
I was pleased to find this quote right off the bat.
"There aren't any real advantages to using nitrogen in a street tire."
For me that established credibility.
Thanks. I hope you noticed I like getting down to empirical data, and not anecdotal evidence. In the case of nitrogen, the benfits seem to disappear in the lab.