LT Tire vs ST Tire

CapriRacer wrote:

Lowsuv wrote:
........Every LT tire meets the standard for ST ratings .
ST tires do not meet the LT standards ......

Sorry, but while the standards are different between ST tires and LT tires, there hasn't been anyone who has done the testing to verify that.
Yes there has. The govt. does the tests.
They are the same in many respects for both tires.
In fact there is a slight, 3% stricter weight carrying standard for STs.... But the LTs standard is 16% stricter for speed, AND the LT has to run severely underinflated for 2 hours at 75 MPH without failure.. The ST does not have to perform this test.. So in reality, The LT pretty much has to do everything that a ST does,,,, and much more.

ST tires are designated to have a larger load carrying capacity, but have a speed restriction of 65 mph. LT tires have a lower load carrying capacity, but have a higher speed capability.
The so called weight advantage of the ST is very slight.. The speed superiority of the LT is signifignant.

You can argue that ST tires aren't built as well as LT tires - either because of the quality of the design or the quality of the manufacturing material and/or processes - but ST tires are designated for a certain task and LT tires are designated for a different task.
LTs were around before STs came into existence.. In fact they were the original trailer tire.
So the LT is a multi task tire.. In fact it is LEGAL to use a LT on a trailer, but ILLEGAL to use a ST on a automobile!!

Nevertheless, there isn't any evidence that either will pass the other's testing requirements.