75mph ST tire

[gmw_photos]

I offer this only as info for the always entertaining and ongoing argument....ooops, I mean "discussion" regarding tires. I was out this morning shopping for a new horse trailer, so of course I looked down at the Chinese ST tire, and saw "75mph" on the sidewall.
I know nothing at all about these tires other than they were round and black, so this is neither a recommendation nor an indictment of them.

"Castle Rock". These were 15" load range D.

[RinconVTR]

Lynnmor wrote:

RinconVTR wrote:

If you feel LT's are better for you, great. Good luck finding them in 14" and 15"...and make sure your wheels and stems can handle the high PSI you now have to run.

Love my 15" USA, LT, Goodyear Wrangler HT's. :B

Come on man...keep up.

How many times have I said LT for TRAILER SERVICE....ONLY.

You sir, have mounted an all season LT tire on your trailer never intended for trailer service. That, in my opinion is no different than mounting a P rated tire because you are using it for something it was never designed for.

And try to tell me LT's are tested more than P tires...and then why you think this is ok, but not in reverse. The aurgument is the same! What a silly debate...OEM tire "test specs". The Google experts can post in red or blue (or whatever color) all they want...its being ignored cause its nothing but internet squawk. And they will ignore me. That's how it works. We move on.

But in regards to this specific tire, find one trailer OEM mounting these on a new trailer or ANY tire OEM who recommends using these in trailer service and you might get my attention. Until then...

[CapriRacer]

JIMNLIN wrote:
No......each tire type/size/load range carries its own load rating.
Nor does it mean a ST 235/85-16 E load range at 3640 lb capacity tire test per the FMVSS test procedures is less stringent than a ST235/85-16 load F at 3960 lbs capacity. ......

But what about an LT235/85R16 Load Range E rated at 3085# at 80 psi, where an ST235/85R16 Load Range E is rated at 3640# at 80 psi? Isn't the equivalent ST tire being tested at a higher load than the LT?

[CapriRacer]

gmw photos wrote:

CapriRacer wrote:
More fuel for the fire:

For those who point to the regulations and the testing required, how do you reconcile the fact that LT tires are testing at lower loading levels than ST tires for the same size? Doesn't this mean that ST tires are tested to more stringent conditions than LT tires?

Barry, I'll pose my response as a question, since you are the tire engineer. Is part of that higher load capacity of the ST tire due to the fact it can be rated for a lower speed ? More speed equals more heat for a given load ?
Or am I off base on that idea ?

Thanks for weighing in on the discussion.

Yes, the lower speed rating does result in a higher load carrying capacity.

[gmw_photos]

CapriRacer wrote:
More fuel for the fire:

For those who point to the regulations and the testing required, how do you reconcile the fact that LT tires are testing at lower loading levels than ST tires for the same size? Doesn't this mean that ST tires are tested to more stringent conditions than LT tires?

Barry, I'll pose my response as a question, since you are the tire engineer. Is part of that higher load capacity of the ST tire due to the fact it can be rated for a lower speed ? More speed equals more heat for a given load ?
Or am I off base on that idea ?

Thanks for weighing in on the discussion.

[JIMNLIN]

CapriRacer wrote:
More fuel for the fire:

For those who point to the regulations and the testing required, how do you reconcile the fact that LT tires are testing at lower loading levels than ST tires for the same size? Doesn't this mean that ST tires are tested to more stringent conditions than LT tires?

No......each tire type/size/load range carries its own load rating.
Nor does it mean a ST 235/85-16 E load range at 3640 lb capacity tire test per the FMVSS test procedures is less stringent than a ST235/85-16 load F at 3960 lbs capacity.

Quote per SeniorGNC;
The difference in endurance testing between a ST and LT tire is significant. Both tires are tested through a equivalent loading/time profile. However, the LT tire is tested at this profile at a higher speed (75 vs. 50 mph) and must still endure an additional 2 hour low pressure test without failure. Thus the overall test for the LT is far more rigorous than the ST test.

[CapriRacer]

More fuel for the fire:

For those who point to the regulations and the testing required, how do you reconcile the fact that LT tires are testing at lower loading levels than ST tires for the same size? Doesn't this mean that ST tires are tested to more stringent conditions than LT tires?

[Huntindog]

RinconVTR wrote:

gmw photos wrote:
Thanks for supporting the argument to buy and use products built to higher standards.

You work for the media eh? Cause you appear to be good at taking statements out of context and adding something I never said.

Hey, I am not here to argue one tire is better than the other, I never have. I simply dont go for the assumptions that all ST's are not tested as well as any given LT We knpw for a FACT that LT tires are tested by the govt. to a much higher standard... It is required by law... You are believing that STs are tested to a much higher standard than what is required by law.. It is a free country and some people believe in leprechans and pixie dust... One can believe whatever they want. That doesn't make it a verifiable FACT. for trailer service or are actually any better, or less prone to fail. The data simply doesn't exist and tire manufactures continue to push ST.Any manufacturer of any product pushes whatever they make the most money producing... Doing otherwise is shirking their duty to their shareholders to make the most PROFIT they can for them.

Those LT's produced for specifically for trailer service (which is the ONLY LT I refer to here) you all know as a matter of fact what standard they are tested to eh? NO YOU DO NOT. See previous comment.So stop it. Just stop.

Also as I have said before, if I pay more than 2x-3x more for any given tire, well heck yeah it better be something better. I could care less if it says LT or ST...I expect a better product.

If you feel LT's are better for you, great. Good luck finding them in 14" and 15"...and make sure your wheels and stems can handle the high PSI you now have to run. Your lack of knowledge on the subject is quite apparent here. Ever hear of LRE ST tires? I have owned a few sets.

And when you have a flat or blow out, PLEASE come on back here and report it. I feel there is a pride issue here, where LT trailer tire owners are not reporting their failures. They are by far the minority on the road, but as numbers grow, failures will too.Ten years of LT use with zero failures. I never made it to two years with ST tires, back when I was an ST believer....

This dead horse is a freak'n zombie...it will never die.

So long as there are people that need to know the truth, and those that spread pixie dust,,,, you are correct

[CKNSLS]

Caution!Thread closing ahead!

[Lynnmor]

RinconVTR wrote:

If you feel LT's are better for you, great. Good luck finding them in 14" and 15"...and make sure your wheels and stems can handle the high PSI you now have to run.

Love my 15" USA, LT, Goodyear Wrangler HT's. :B

[RinconVTR]

gmw photos wrote:
Thanks for supporting the argument to buy and use products built to higher standards.

You work for the media eh? Cause you appear to be good at taking statements out of context and adding something I never said.

Hey, I am not here to argue one tire is better than the other, I never have. I simply dont go for the assumptions that all ST's are not tested as well as any given LT for trailer service or are actually any better, or less prone to fail. The data simply doesn't exist and tire manufactures continue to push ST.

Those LT's produced for specifically for trailer service (which is the ONLY LT I refer to here) you all know as a matter of fact what standard they are tested to eh? NO YOU DO NOT. So stop it. Just stop.

Also as I have said before, if I pay more than 2x-3x more for any given tire, well heck yeah it better be something better. I could care less if it says LT or ST...I expect a better product.

If you feel LT's are better for you, great. Good luck finding them in 14" and 15"...and make sure your wheels and stems can handle the high PSI you now have to run.

And when you have a flat or blow out, PLEASE come on back here and report it. I feel there is a pride issue here, where LT trailer tire owners are not reporting their failures. They are by far the minority on the road, but as numbers grow, failures will too.

This dead horse is a freak'n zombie...it will never die.

[gmw_photos]

CKNSLS wrote:
The thread that refuses to die.....!

And more than just "the thread" that won't die, it's more the "the subject" that won't die. Which is good for a couple reasons. It's a safety related subject, and there are any number of new rv users that come along to the forum looking for information and discussion on subjects they may not have considered before. Long time trailer users with solid information to share can help them by keeping these discussions going.

[CKNSLS]

The thread that refuses to die.....!

[Huntindog]

RinconVTR wrote:
@Huntingdog - You can post all the Federal standards you want, they are meaningless because (AGAIN) we will never know what any given OEM actual test specs are.

What you posted are minimum standards, that I highly doubt many...if any...OEM's do not exceed.

Take Carlisle and Goodyear for example, both allow speeds well over 65mph on some of their ST branded tires. You think they never tested their tires at such speeds? They never exceeded the Federal test spec? Yaaa riiiight.

And all the subjective testing in the world will not prevent blow outs. They will continue to happen on EVERY make and model tire in the world. That's a fact!

You gotta be kidding.

You are taking marketing propoganda as fact.

A fact is something that is verifiable. The govt. testing standards ARE verifiable. What you are believing in is NOT verifiable.

You yourself state that nobody knows what standards the manufacturers test to... Yet you believe that they are exceeding the federal standards... Why do you believe this? Is it verifiable?

[4bearhug]

RinconVTR wrote:
@Huntingdog - You can post all the Federal standards you want, they are meaningless because (AGAIN) we will never know what any given OEM actual test specs are.

What you posted are minimum standards, that I highly doubt many...if any...OEM's do not exceed.

Take Carlisle and Goodyear for example, both allow speeds well over 65mph on some of their ST branded tires. You think they never tested their tires at such speeds? They never exceeded the Federal test spec? Yaaa riiiight.

And all the subjective testing in the world will not prevent blow outs. They will continue to happen on EVERY make and model tire in the world. That's a fact!

I have based my decision to go to LT based upon my own ST experiences and the fact that LT tire are tested to a higher standard.

My experience over the past 5 years are two blow outs on ST tires that were both in excellent physical appearance, not overloaded, on a TT and 5er. Both blow outs caused damage to the RV. Carlisle and Goodyear were the brands. That's enough personal experience for me to make the switch.

[gmw_photos]

RinconVTR wrote:
@Huntingdog - You can post all the Federal standards you want, they are meaningless because (AGAIN) we will never know what any given OEM actual test specs are.

What you posted are minimum standards, that I highly doubt many...if any...OEM's do not exceed.

Take Carlisle and Goodyear for example, both allow speeds well over 65mph on some of their ST branded tires. You think they never tested their tires at such speeds? They never exceeded the Federal test spec? Yaaa riiiight.

And all the subjective testing in the world will not prevent blow outs. They will continue to happen on EVERY make and model tire in the world. That's a fact!

To use your words though, if we assume the tire company builds a tire to exceed the minimum specs, and if further, the minimum specs for a P or LT tire are higher than the minimum specs of an ST tire, we do indeed end up with a LT tire being built to a higher standard.

I like those odds. Thanks for supporting the argument to buy and use products built to higher standards.