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Old 01-24-2021, 09:02 AM   #1
drew999999
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Bigger Tires - Will they fit?

So time to get rid of the ticking time bombs on my rig (Trailer Kings). I feel lucky that I've gotten 2 years and about 5k without any issues other than picking up a nail last year. I'm wanting to make the move to Goodyear Endurance, but when looking at the specs, I'm running seeing a potential issue with the ratings.

Trailer King ST235/80R16E - 3527lbs (Load Index 124)
Endurance ST235/80R16 - 3417lbs (Load Index 123)

My 5er has 7k axles and runs about 11.5k empty (around 12.5k loaded per the scale). I'm not really comfortable about going down in load capacity with tires, so started looking at the ST235/85R16 with a load index 125 (3638lbs) which would exceed the axle ratings. Looking to see if anyone else has gone up in diameter on the narrow spaced axles and if there are any clearance issues to worry about. It looks like there's about 1 inch increase in diameter with the 85s.
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Old 01-24-2021, 09:12 AM   #2
travelin texans
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Go to the same size in a G rated.
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Old 01-24-2021, 10:11 AM   #3
sourdough
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Originally Posted by travelin texans View Post
Go to the same size in a G rated.

^^^^What Danny said. I went from LRF to LRG before the trailer left the lot. Make sure the wheels are rated for 110psi. The intent is not to overload the axles but to handle the weight placed upon the tires in a more reliable/robust manner.
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Old 01-24-2021, 10:20 AM   #4
Wing-in-it
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Just got these Sailuns for mine....I really like them so far. Made in Vietnam.

https://simpletire.com/paid?v=1&tire...98c652df322db0
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Old 01-24-2021, 10:25 AM   #5
JRTJH
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The TK tires on your trailer are rated: ST235/80R16E - 3527lbs@80PSI
GY Endurance same size is: 3420@80PSI

If your axles are rated at 7000 pounds, then the GY Endurance is not rated high enough to maintain your axle rating capacity. That would "violate your tire loading sticker" on the trailer and could lead to legal issues if you're ever involved in an accident... It wouldn't be a "citation issue" that would concern me, but a "civil issue" if you or your insurance are ever sued in the event of an accident whether your fault or not.

You can go to GY ST235/85R16E rated: 3640@80PSI

Or you might consider:
Carlisle 235/80R16 LRE which, like your TK's are rated at 3520@80PSI or
Carlisle Radial Trail HD 235/85R16 LRF rated: 3960@95PSI

Or, you might consider Sailun STST235/80R16G rated: 4080@110PSI.

Any increase in tire size should consider wheelwell spacing.
Any increase in LR should consider wheel PSI/load rating.

If cost is a consideration, Goodyear Endurance tires do have a "premium price" to go along with the "made in USA" label.

Carlisle tires and Sailun tires are made in China, but have an excellent reputation and are often available at half the price of the GY Endurance tires.
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Old 01-24-2021, 10:48 AM   #6
Wing-in-it
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Quote:
Originally Posted by JRTJH View Post
The TK tires on your trailer are rated: ST235/80R16E - 3527lbs@80PSI
GY Endurance same size is: 3420@80PSI

If your axles are rated at 7000 pounds, then the GY Endurance is not rated high enough to maintain your axle rating capacity. That would "violate your tire loading sticker" on the trailer and could lead to legal issues if you're ever involved in an accident... It wouldn't be a "citation issue" that would concern me, but a "civil issue" if you or your insurance are ever sued in the event of an accident whether your fault or not.

You can go to GY ST235/85R16E rated: 3640@80PSI

Or you might consider:
Carlisle 235/80R16 LRE which, like your TK's are rated at 3520@80PSI or
Carlisle Radial Trail HD 235/85R16 LRF rated: 3960@95PSI

Or, you might consider Sailun STST235/80R16G rated: 4080@110PSI.

Any increase in tire size should consider wheelwell spacing.
Any increase in LR should consider wheel PSI/load rating.

If cost is a consideration, Goodyear Endurance tires do have a "premium price" to go along with the "made in USA" label.

Carlisle tires and Sailun tires are made in China, but have an excellent reputation and are often available at half the price of the GY Endurance tires.
The Carlisle’s suck.....here’s some pics of mine after getting them replaced under warranty. See pics...1st pic is Carlisle. Second Pic is Carlisle replacement under warranty both sets of tires were under 2K in mileage. Pics 3&4 are the Sailun.

I hope this helps.


Sailuns are made in Vietnam see pics of mine.
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Old 01-24-2021, 02:11 PM   #7
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Quote:
Originally Posted by Wing-in-it View Post
The Carlisle’s suck.....here’s some pics of mine after getting them replaced under warranty. See pics...1st pic is Carlisle. Second Pic is Carlisle replacement under warranty both sets of tires were under 2K in mileage. Pics 3&4 are the Sailun.

I hope this helps.


Sailuns are made in Vietnam see pics of mine.
It's great that you found satisfactory tires. I would, however, disagree with your assessment of Carlisle tires. I'm on my third set with ZERO problems. I think we both agree that the Sailun tires are, for the most part, good tires. That said, I've read numerous reports of owners having problem with Sailun as well as every other tire brand that's currently on the market...
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Old 01-24-2021, 02:43 PM   #8
drew999999
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Thanks for all of the great input! I decided to go brave the cold, run out to the storage lot, and do some measurements. Looks like I'm about 4.5 inches tire to tire with about 4 inches between the tire and underbelly. So I'd think the 85s would work. But while there, I also checked the rims and see that I'm good for 110psi and 3750lbs, so the Sailuns may be in the mix too.

One interesting thing I found about the Sailuns, it that they're owned by the same company as most of the hated tires on the forums. TBCBrands owns TowMax, TowStar, Trailer King, along with some others. Not a big deal to me, but thought it was kind of strange that they own the most hated and loved brands on the RV forums.
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Old 01-24-2021, 02:52 PM   #9
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Originally Posted by drew999999 View Post
Thanks for all of the great input! I decided to go brave the cold, run out to the storage lot, and do some measurements. Looks like I'm about 4.5 inches tire to tire with about 4 inches between the tire and underbelly. So I'd think the 85s would work. But while there, I also checked the rims and see that I'm good for 110psi and 3750lbs, so the Sailuns may be in the mix too.

One interesting thing I found about the Sailuns, it that they're owned by the same company as most of the hated tires on the forums. TBCBrands owns TowMax, TowStar, Trailer King, along with some others. Not a big deal to me, but thought it was kind of strange that they own the most hated and loved brands on the RV forums.
Yup, and back in 1970-80's GM owned Cadillac and Chevrolet which made the Vega.
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Old 01-24-2021, 03:04 PM   #10
drew999999
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Good times. I miss the days with a 400 small block shoved into a Vega!

Just because you guys are a great resource, I believe my J55 wheels are 6 inch width. Looking at the Sailuns, they suggest 6.5-7 inch wheels. Not sure these will work. Anyone else running these on the stock 8 lug wheels that Keystone puts on our rigs?
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Old 01-24-2021, 03:22 PM   #11
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The Sailuns are being built in Viet Nam to get around the tariffs on Chinese products. Besides these tires being used on RV trailers, they are actually commercial tires as listed in their catalog. We finally made the switch from Goodyear G614's to the Sailun S637 last year when the Goodyear's were not available, and so far, they appear to be as good or better than the Goodyear's. The Montana line is using the Sailuns on the stock 16 inch wheels, and I believe they are still using the 6 inch wheels like are on our rig, and the tires work just fine. I think the 6.5 to 7" dimension is preferred, but 6" is allowed. This is what is currently on the 2021 Montana's: https://www.trekwood.com/products/13...Black-Hercules
https://wiki.tireweb.com/index.php?title=Sailun_Tire
https://www.tirebusiness.com/news/sa...er-three-years
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Old 01-24-2021, 03:24 PM   #12
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Originally Posted by drew999999 View Post
...
One interesting thing I found about the Sailuns, it that they're owned by the same company as most of the hated tires on the forums. TBCBrands owns TowMax, TowStar, Trailer King, along with some others. Not a big deal to me, but thought it was kind of strange that they own the most hated and loved brands on the RV forums.
TBCBrands is the USA area importer/marketer for Sailun, not the manufacturer of the tires....

Interestingly, TBCBrands, Inc is jointly owned by Sumitomo Rubber Industries and Michelin Tire Company in a 50/50 partnership.

So, if you "go back far enough in the lineage" Michelin owns "part of the marketing/distribution network" for Sailun, Power King and TowMax tires in the USA.....

Like Cadillac and Vega on steroids, I suppose
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Old 01-24-2021, 03:58 PM   #13
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Originally Posted by drew999999 View Post
Thanks for all of the great input! I decided to go brave the cold, run out to the storage lot, and do some measurements. Looks like I'm about 4.5 inches tire to tire with about 4 inches between the tire and underbelly. So I'd think the 85s would work. But while there, I also checked the rims and see that I'm good for 110psi and 3750lbs, so the Sailuns may be in the mix too.

One interesting thing I found about the Sailuns, it that they're owned by the same company as most of the hated tires on the forums. TBCBrands owns TowMax, TowStar, Trailer King, along with some others. Not a big deal to me, but thought it was kind of strange that they own the most hated and loved brands on the RV forums.
There is no reason to go to a plus sized tire when the certified designated size that came on your trailer has two higher load ranges (F & G).
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