Francesca Knowles wrote:
JJBIRISH wrote:
Believe what you will, the ST tire DOES NOT MEET THE SAME testing and safety requirements as the other highway tires do… and IMHO they are not as safe as P or LT tires…
§571.139 Standard No. 139; New pneumatic radial tires for light vehicles. S1. Scope and purpose. This standard specifies tire dimensions, test requirements, labeling requirements, and defines tire load ratings . S2 Application. This standard applies to new pneumatic radial tires for use on motor vehicles (other than motorcycles and low speed vehicles)
I guess that means that every motorcyclist on earth is doomed, because that/those tires are excluded from the standard, too. Unless of course certain tire types are excluded due to design/mechanical differences making them incompatible with this set of standards. ;)
ST's exclusion from this rule does not mean they're "less safe".
The fact of there being no restrictions per passengers riding in trailers equipped with them seems to me to be better proof of their "safety" than popular opinion.
This of course assuming they're used within all design parameters.
You continue to waste everyone’s time in your arguments by moving the goal post just to remain argumentative… your 2 post prove that and that you no longer maintain that every tire approved for highway use MUST MEET THE SAME STANDARDS OF SAFETY…
“I continue to maintain that every tire approved for highway use must meet the same standards of SAFETY”
To
“I guess that means that every motorcyclist on earth is doomed, because that/those tires are excluded from the standard, too. Unless of course certain tire types are excluded due to design/mechanical differences making them incompatible with this set of standards.”
You offer no evidence what so ever that the ST tire is as safe or that it is even required to be as safe as another highway tire…
So you now want to argue that due to design and mechanical differences some tires are incompatible with these standards… well with that I finally agree… thanks but no thanks…
rockportrocket wrote:
If you will check, the real difference between SP tires and LT tires, is that the sidewalls are stronger on the LT tires, therefore reducing the failure of sidewalls. That really is the only difference and that's why they don't recommend SP tires for steer tires, as they fail under side load.
There is a lot of differences between the two tires, most of its proprietary and not available for our consumption…
what is known is they fail at a high rate when compared to other tires…. they seem to dry rot at a rate much faster than other tires even though they claim to contain more UV protectants in them, and they have about the worst warranty coverage’s in the tire industry…
Low quality in compounding, in materials and in build processes add up to the typical built ST tire… but it isn’t the tires design… the design as a trailer tire is sound, unfortunately it allows for even more excuses and blame…
With the rush to China by ST tire makers and all things being now equal the tire builders may actually have to compete for their market share by building a better tire…
A good example of that is the new Carlisle radial tire that now has a cap ply… it took almost 40 years for Carlisle to realize the importance of that cap ply in radial construction, even though it was common knowledge in the entire tire industry…
