JJBIRISH wrote:
A few answers and thought provoking statements.
“The ST tire is just designed to withstand heavier loads than comparably sized tires from other designs.”
Translated is, the ST tire is rated to carry its fully rated load, (so are LT tires. P tires must be degraded for trailer axle use.) or in normal speak has no safety factor built into its specifications like the other type of tires that are also passenger carrying tires and must have a reserve built in (The only reserve difference is the way the tires are regulated. Then the reserves are provided by air pressure, not excess tire load capacity.) and also need to be de-rated even farther under some conditions…
The truth of the matter is ST tire will carry very little more if any at all, except for the easier certification standards (They are certified to their function.) and allowable ratings… if you allow for a respectable 15 % reserve in the ST tire the ratings would be very close to the same… (Reserves for all tires are derived from their published load capacity via tire pressure manipulations up to and including the maximum amount as depicted on their sidewalls. Anything other than that would have to be described on the tire’s sidewall information.)
The only real differences are legal ones that I am criticized for bringing up even though they exist and are real… I’m with you on that one.
Let’s not forget that RV tires have more UV protestants built into them… So say their manufacturers.
But in real life RV tires last no longer, if as long, and even worse the ST tire will last on average half as long as non RV tires in passenger use even with similar limited use… (ST tire manufacturers will tell you the same thing. But you left something out. LT & P tires are regulated differently and are setting around on more than adequate load capacity reserves. Most often the ST tires are not. The more load on the tire even in stationary usage will degrade faster.
Industry lobbying kept the ST tires from construction standard upgrade consideration when other tires had the standards changed and raised… the industry argued that the ST tire is not a passenger tire it is for trailer use only and there was very little risk of injury or property damage from their use as already built…
(You will have to provide a reference to support those statements. Being specifically designed for trailer axles does not in itself disqualify them from carrying passengers.
Geographical location is not a prerequisite for inferior production techniques. A journey via internet research will reveal many tire plants around the world in much better physical conditions than you might perceive. We live in a global society and peoples that produce goods for the global population have certification standards.
ISO/TS 16949 is the technical specification for automotive quality management systems. It formalizes, under a single global standard, the quality management system requirements that must be satisfied by those trading in the automotive industry.
ISO 14001 addresses "Environmental Management." It is the standard for what the organization does to minimize harmful effects on the environment caused by its activities and to achieve continuous improvement of its environmental performance.
How would one pass an unannounced management inspection if they were not, in fact, trained and qualified by the certification standards.
FastEagle
