Jul-20-2015 01:25 PM
Jul-23-2015 05:15 AM
Jul-23-2015 01:37 AM
gmw photos wrote:
Note to the original poster: everybody is beating around the bush here. Let's cut to the chase: junk the crummy ST tires, and do not replace them with yet more junk ST tires. Buy LT tires, and then go drive at normal highway speeds, and not worry.
Lets make it simple:
ST= junk
LT = good
EDIT: if those are the typical 205/75-14, then what I did was went to a 185-14 Kumho 857. This a commercial LT tire, in a load range D, that is marketed for trailer use also. Tire rack sells them. They work well.
Jul-23-2015 12:18 AM
gmw photos wrote:
Would you care to enlighten me in an engineering sense why a ST tire "cannot be fitted to a passenger car or truck" ? What, specifically is it about the tire that makes it unsuitable for use on a vehicle other than a trailer ?
Jul-22-2015 08:13 PM
Jul-22-2015 07:58 PM
Walaby wrote:gmw photos wrote:
Who knows....for them, they may decide the ST is what they want to run. But at least they have been given the suggestion to look a little deeper at the whole process of selection. After all....tires are pretty important.
One thing we can all agree on hopefully is the importance of correct inflation.
So, as a newbie, I have been reading this thread with great interest, and performing my own, independent (off this website) research (as suggested). From what I have read, yes, you can indeed run LT tires on a trailer, given they are properly matched load wise, and you select an LT tire that has at LEAST the same load rating as the ST the OEM originally equipped the trailer with.
If a manufacturer alters the vehicle he is required to disclose that, even if the alteration still meets or exceeds the standards. So, yes, the manufacturer would seem to be able to switch tires from ST to LT, but would have to disclose that, and I believe update the labeling accordingly. Can't just do it without disclosing it.
Having said that, and assuming, for the sake of argument, that one still intends to keep speed at 65, and one intends on buying a quality ST tire, what would the advantage of LT vs ST be? My still open for debate thoughts are
There is currently only one ST tire that enjoys a decent reputation. That is the Maxxis.
But Maxxis has a major drawback. Availability.
Post after post on here where they have to be ordered.... Since any tire can suffer a road hazard and need replacing at any time, then this can possibly leave one stranded waiting for a replacement.
This won't happen with an LT tire. They are available everywhere.
(1) Potentially able to exceed 65MPH, if necessary, and not exceed the speed rating of the tire. I totally get that ST tires could prematurely fail by exceeding the rated speed. But, reading some of these posts, I worry that I exceeded 65 for a couple hundred yards, and now Im running on borrowed time. It's really a factor of tire temp, and running higher speeds heat the tires up over time. I've read if you increase the pressure of the ST tire, you can run them over 65. I wouldn't but.... In fact, Im comfortable towing at 65 and enjoy that speed, so no need to exceed it, unless briefly due to traffic situatins.Every time you exceed 65 on an ST tire, you are damaging it. This damage is cumulative, and can be hastened by heat, and even slight underinflation... It is also hidden inside the tire. You cannot see it or feel it.
Personnally, I do not feel it wise to run any piece of equipment close to it's max continuously.
Many other industries feel the same way. I remember from flight school many years ago that aircraft engines were not to be run at max for long.. IIRC it was recommended not to exceed 2/3s throttle for long.
(2) Perhaps longer lasting tires? ST's are recommended to be replaced after 3 years, regardless of miles. Could one get more than 3 years use out of LT's, running on a trailer? Would you want to replace even LT's after 3 years?
LTs will last longer. I replace mine at 5 years.. And I am in Phoenix AZ, about as tough a place for tires as there is. Michelin says you can go longer. I sell my great looking used LT tires on Craigs list to help defer the cost of the new ones.
What other advantages would there be to switching to LT's?
No tire problems compared to STs.. Often you read about all of the precautions one must take with ST tires... It's as if they are made of China... But the TT tires follow the LT tires on my truck, yet my Truck tires just do the job reliably with out all the tender loving treatment we are told is necessary with STs.
If you were to read the testing requirements for LT tires vs. ST tires, you will see the difference for yourself
There are, no doubt, inferior/junk ST tires. There are also inferior/junk LT tires. There are good ST tires (from what I've read) as well. Not all ST tires are junk.
Now this is where you are pretty much dead wrong.
LT tires, especially in the 16" rim size are available in many different price points and quality levels. Many from the same manufacturer.
But most manufacturers that make ST tires only make one. An entry level cheap one. They call it affordable.
Still learning, with an open mind.
Mike
Jul-22-2015 07:20 PM
93Cobra2771 wrote:Did you know that a lot of high end TTs offer LT tires, as either standard or optional equipment?
I'd be willing to bet there are no tire manufacturers recommending LT tires over ST tires for trailer applications. Legally speaking, makes no sense for them to do so.
Out of curiosity, which fifth wheel manufacturers are supplying their product with LT tires? Seems like that would be a legal issue in the case of a blowout/wreck "X product was delivered from the factory with non trailer tires and caused X incident". Not saying that has happened, just trying to make sense of it.
Just throwing that out there, as it seems odd to me.
Jul-22-2015 07:09 PM
Jul-22-2015 07:03 PM
gmw photos wrote:
Who knows....for them, they may decide the ST is what they want to run. But at least they have been given the suggestion to look a little deeper at the whole process of selection. After all....tires are pretty important.
One thing we can all agree on hopefully is the importance of correct inflation.
Jul-22-2015 06:51 PM
JIMNLIN wrote:I'd be willing to bet there are no tire manufacturers recommending LT tires over ST tires for trailer applications. Legally speaking, makes no sense for them to do so.
legally speaking you would lose that bet.
You must be a new guy to the trailer towing world. I was a new guy also....many years ago.
Before the tire makers came up with a ST tire OEM tires on our trailers were light truck and passenger car tires.
And before the net RV trailers came OEM with LT tires
I have Emails from Michelin/BFG/Cooper/Goodyear/Bridgestone all recommending a particular line of LT tires for trailer use and we get a full mfg warranty just like we always have.
There are no legal issues/no vehicle code violations regarding using a P or LT on a trailer as long as it meets or exceeds the trailers axles ratings or the trailers registered gross weight if a state enforces such.
Jul-22-2015 06:14 PM
I'd be willing to bet there are no tire manufacturers recommending LT tires over ST tires for trailer applications. Legally speaking, makes no sense for them to do so.
Jul-22-2015 06:00 PM
Jul-22-2015 03:02 PM
Jul-22-2015 03:02 PM
dodge guy wrote:
You guys do know that most of the large, heavy, full time fifth wheels come standard with LT tires! Even some TH's come standard with them. If I could've gotten a set of LT "E" tires in a 15" size I would have. I would have to go to a 16" rim to get an "E" rated LT tire. I'm happy with my Carlisle ST's and will continue to use them.
There is nothing wrong with an LT tire on a trailer. Carlisles facts are a bit biased though, as they want you to buy their trailer tires!
Jul-22-2015 02:49 PM
dodge guy wrote:
You guys do know that most of the large, heavy, full time fifth wheels come standard with LT tires! Even some TH's come standard with them. If I could've gotten a set of LT "E" tires in a 15" size I would have. I would have to go to a 16" rim to get an "E" rated LT tire. I'm happy with my Carlisle ST's and will continue to use them.
There is nothing wrong with an LT tire on a trailer. Carlisles facts are a bit biased though, as they want you to buy their trailer tires!
Jul-22-2015 12:31 PM
dodge guy wrote:
You guys do know that most of the large, heavy, full time fifth wheels come standard with LT tires! Even some TH's come standard with them. If I could've gotten a set of LT "E" tires in a 15" size I would have. I would have to go to a 16" rim to get an "E" rated LT tire. I'm happy with my Carlisle ST's and will continue to use them.
There is nothing wrong with an LT tire on a trailer. Carlisles facts are a bit biased though, as they want you to buy their trailer tires!