Tire life?

[Navyvette]

My question is I have S637 tires that are 12/15 dated with lots of tread so what’s the usual life span on these tires?
Also they list 110psi on the sidewall and I’m running 80psi. Should I air them up to max?
In a couple months I’m making the journey from Houston to Orlando and prepping early.

[Navyvette]

timmac wrote:

Navyvette wrote:
She’s close to 16k loaded and I’m thinking 8k axles. I’ll air them up to 110psi. I feel like coming up on 3 yrs sounds like they are good on age. They look good.
I’ll be selling the coach once I get there and buying a house. Just want to make sire the next owner is set as well. I’m dropping it for a few small repairs before I sell.

85 to 90 psi would be just fine with that weight but what is the ply rating, E, F or G.

They are G rated.

[laknox]

CALandLIN wrote:

fj12ryder wrote:
Well, since the "new" ST Sailun's are the same as the "old" LT Sailun's, what do you suppose they did?

To use the ST prefix they had to change the carcass construction. It's the only way they could increase the load capacity between the two by 650#. Of course, that's the ST235/85R16 LRG. The ST235/80R16 LRG, being all steel, is probable a completely new construction.

(snipped)

Not from what I've heard from at least 3 different tire dealers and from what I've read in a couple different RV fora. Every time this has come up, they've all said that the STs were virtually the same at the old LTs, with only minor cosmetic changes to tread design and, of course, sidewall #'s. I've never cut them apart to check, though.

Lyle

[CALandLIN]

fj12ryder wrote:

CALandLIN wrote:

fj12ryder wrote:
Well, since the "new" ST Sailun's are the same as the "old" LT Sailun's, what do you suppose they did?

To use the ST prefix they had to change the carcass construction. It's the only way they could increase the load capacity between the two by 650#. Of course, that's the ST235/85R16 LRG. The ST235/80R16 LRG, being all steel, is probable a completely new construction.

The off shore tire builders do not waste much time in being competitive. They have flooded the market with numerous brands building these two Sailun sizes. Even the grand daddy ST builder has reciently introducrd their verson of the popular steel tires. With retailers such as Walmart, Sams and Discount Tire providing them they will become popular replacements when the need arises on the road.


Look Here!

There seems to be an argument that the ST tire and the LT tire are the same design and construction. Per the post above your last one. They sure look the same.

You couldn't give me a Carlisle, I'm not convinced they're any better than the ones I owned some years ago. Maybe in a few years after they've been out for 4 or 5 years with no issues.

"The off shore tire builders do not waste much time in being competitive. They have flooded the market with numerous brands building these two Sailun sizes."

I'm not sure I understand what you're saying here. "Sailun sizes"?

In the first paragraph I identified the two ST steel cased tires Sailun builds. Carlisle is just a reference. The two tires mentioned are being built by at least another dozen brands.

Basic tire construction materials are displayed on the tire sidewall. The actual size and strength - tensile - of the cording is confidential. TRA oversees such things for the tire industry. Of course their information about the materials are also confidential.

[fj12ryder]

CALandLIN wrote:

fj12ryder wrote:
Well, since the "new" ST Sailun's are the same as the "old" LT Sailun's, what do you suppose they did?

To use the ST prefix they had to change the carcass construction. It's the only way they could increase the load capacity between the two by 650#. Of course, that's the ST235/85R16 LRG. The ST235/80R16 LRG, being all steel, is probable a completely new construction.

The off shore tire builders do not waste much time in being competitive. They have flooded the market with numerous brands building these two Sailun sizes. Even the grand daddy ST builder has reciently introducrd their verson of the popular steel tires. With retailers such as Walmart, Sams and Discount Tire providing them they will become popular replacements when the need arises on the road.


Look Here!

There seems to be an argument that the ST tire and the LT tire are the same design and construction. Per the post above your last one. They sure look the same.

You couldn't give me a Carlisle, I'm not convinced they're any better than the ones I owned some years ago. Maybe in a few years after they've been out for 4 or 5 years with no issues.

"The off shore tire builders do not waste much time in being competitive. They have flooded the market with numerous brands building these two Sailun sizes."

I'm not sure I understand what you're saying here. "Sailun sizes"?

[CALandLIN]

fj12ryder wrote:
Well, since the "new" ST Sailun's are the same as the "old" LT Sailun's, what do you suppose they did?

To use the ST prefix they had to change the carcass construction. It's the only way they could increase the load capacity between the two by 650#. Of course, that's the ST235/85R16 LRG. The ST235/80R16 LRG, being all steel, is probable a completely new construction.

The off shore tire builders do not waste much time in being competitive. They have flooded the market with numerous brands building these two Sailun sizes. Even the grand daddy ST builder has reciently introducrd their verson of the popular steel tires. With retailers such as Walmart, Sams and Discount Tire providing them they will become popular replacements when the need arises on the road.


Look Here!

[timmac]

Navyvette wrote:
She’s close to 16k loaded and I’m thinking 8k axles. I’ll air them up to 110psi. I feel like coming up on 3 yrs sounds like they are good on age. They look good.
I’ll be selling the coach once I get there and buying a house. Just want to make sire the next owner is set as well. I’m dropping it for a few small repairs before I sell.

85 to 90 psi would be just fine with that weight but what is the ply rating, E, F or G.

[JIMNLIN]

\ The 16" Sailun S637 LT re designated to ST tire story from a dealer which mirrors what I was told by simpletire.com when I ordered my LT S637's. (paste and copy)

rustybore

Perkiomenville PA
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Here are some more observations on these LRG S637 tires...

Over the last 6 years or so, we have sold HUNDREDS of Sailun S637 tires in the 235/85R16G size. First the LT version, and more recently, the ST version.

Same tire, different designation.... and yes this change in designation was indeed done to beat the tariff on LT tires and keep them reasonably priced. The tire was not changed.

We have sold these tires for all kinds of trailers, Stock trailers for ranchers, Toy Haulers, RV trailers, Stacker car trailers for race cars, Open car trailers for hot shot haulers. There have been a bunch of repeat customers over the years, and for many commercial type users, this is the only tire they will buy.

My point is, if your considering the Sailun S637, do it. A year from now, you will be back on this forum telling others about how well these tires have worked for you!

One note of caution: be sure your wheels are suitable for the higher load capacity and 110 PSI pressure. This is important.

30 years in business on my own, with over 40 years of doing tires!

[Me_Again]

CALandLIN wrote:



IN bold: NHTSA would not allow that and the TRA would not approve it.

They let GY get away with it on their G614 because they registered the tire name as Regional Service Trailer (RST) and put "for trailer service only" on their sidewalls. That made it unique.

Yet Sailun did it! So???

[Wills6_4_Hemi]

5 years! Imho

[fj12ryder]

Well, since the "new" ST Sailun's are the same as the "old" LT Sailun's, what do you suppose they did?

[CALandLIN]

laknox wrote:

Navyvette wrote:
My question is I have S637 tires that are 12/15 dated with lots of tread so what’s the usual life span on these tires?
Also they list 110psi on the sidewall and I’m running 80psi. Should I air them up to max?
In a couple months I’m making the journey from Houston to Orlando and prepping early.

FWIW, the Sailuns =are= LT tires, just rebranded at STs for import tax purposes. I'd run them for at least another 3 years, barring any issues, so long as you keep them covered and use a good treatment, like Aerospace 303, which =adds= back some of the compounds that volatilize out over time, or which stuff like Armor All actually pulls out of the tires. I'd also run at much higher pressures. Someone recently posted here about how they'd pressured down their Sailuns to match the load and, when he checked, his tires were running considerably =hotter= than his older, E-rated tires. He ended up running pressure back up to max and his temps came down on the order of 40-50 degrees!

Lyle

IN bold: NHTSA would not allow that and the TRA would not approve it.

They let GY get away with it on their G614 because they registered the tire name as Regional Service Trailer (RST) and put "for trailer service only" on their sidewalls. That made it unique.

[laknox]

Navyvette wrote:
My question is I have S637 tires that are 12/15 dated with lots of tread so what’s the usual life span on these tires?
Also they list 110psi on the sidewall and I’m running 80psi. Should I air them up to max?
In a couple months I’m making the journey from Houston to Orlando and prepping early.

FWIW, the Sailuns =are= LT tires, just rebranded as STs for import tax purposes. I'd run them for at least another 3 years, barring any issues, so long as you keep them covered and use a good treatment, like Aerospace 303, which =adds= back some of the compounds that volatilize out over time, or which stuff like Armor All actually pulls out of the tires. I'd also run at much higher pressures. Someone recently posted here about how they'd pressured down their Sailuns to match the load and, when he checked, his tires were running considerably =hotter= than his older, E-rated tires. He ended up running pressure back up to max and his temps came down on the order of 40-50 degrees!

Lyle

[JIMNLIN]

ST tires are required to be labeled for trailer use only as the renamed 16" Sailun S637 are.
I have 6 S637 on a triaxle GN stock trailer. These tires are over 6 years old and over 28k miles and were the LT designation before Sailun did the re ID for the 16" S637 for cheaper import tax reasons for P and LT tires.

If you want the tire to last 7-10 years and 60k-80 miles of trouble free service keep them pumped to max sidewall unless you pulled a newb and way over tired the trailer. A 3750-4400 lb rated tire isn't the best idea for a trailer with 2500-2800 lb per tire load.
Then pay attention to what tire experts tell us about ply shear regardless of the tires load range or psi in them.
If you use a commercial grade G load tire for 2-3 years and 20k-30k miles at 80-85 psi then it can take abuse like that unlike a lessor grade tire.

There is pages and pages for reading what tire experts tell us about best tire pressures for trailer use and the reasons why like our resident tire engineer Roger Marble in his rvtiresafety.net blog.interply shear

Lots to read but will help anyone better understand interply shear in all tires especially a 110 psi tire with only 80-85 psi in them.

[fj12ryder]

Me Again wrote:

donn0128 wrote:
ST tires I would change out at 4-5 years regardless of milage.
LT tires which is my preference I would change out at 7 years regardless of miles.

So the Sailun S637 was a LT tire originally and was re-labeled to ST for import tax reasons. So which category would you put them in? They are also an all steel ply tire.

Chris

It may have been called an LT tire, but they plainly said on them "For Trailer Use Only". Mine are 5 years old and I figure they're good for at least a couple more years.