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Old 05-06-2015, 02:16 PM   #71
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You won't have any trouble with those Sailun S637s, they are a great tire. They are All position LT commercial truck tires and in that size are built for LowBoy and heavy equipment trailers. I have them on my new Gateway and love them so far.
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Old 05-06-2015, 06:59 PM   #72
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The rating of 129/125 is for single or dual application. I know 125 is 3750 so 129 must be above that again. If I recall right
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Old 05-07-2015, 09:45 AM   #73
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Thank you for your reply. All info I have is directly from the tire. ST235/85 R16 Lrg 4080 lb @110 psi 129/125 L. Date code is 1015, so maybe engineering and construction standards have increased the quality of these tires. I am going to have them installed and report in the future of my results.
If the tires say 4080# and 75 mph then I would go with that info.

Hopefully the quality of the tires is much better than the information on the company web site
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Old 05-07-2015, 06:11 PM   #74
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Pics of tire
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Old 05-07-2015, 11:48 PM   #75
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Originally Posted by Tireman9 View Post
If the tires say 4080# and 75 mph then I would go with that info.

Hopefully the quality of the tires is much better than the information on the company web site
Here's one for you. In the pictures in post 74 (above) the tire is showing a service description of 129/125L. The tire pix shows a LRG and 14 ply rating.

The tire says it's a ST so only the LRG applies as service descriptions are not official for ST and LT tires (just informative).

Here is a reference showing the same tire with a service description of 126/123L.
http://www.sailuntire.ca/MRT/S637.html

There is a asterisk on 235/85R16 stating it's for trailer service only.



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Old 05-08-2015, 03:45 AM   #76
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Just read that last night.
The 637 use to be an LT tire and used in Europe as a steer and all position tire.
I will wait on the verdict on this tire.
To me an ST is a downgraded LT.
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Old 05-08-2015, 07:54 AM   #77
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Appy,
I hope those tires work good for you, if you still have problems, I would suggest that you go with the 215/75R17.5" tires and wheels. Even the factory has gone to these because the 16" tires are just not stout enough to handle the weight of those units.
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Old 05-08-2015, 08:01 AM   #78
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Reading the USA Web site on the Sailun S637 tire, it appears that this tire is a regional all position tire for the truck market. Rim size from 16 through 22.5. The 16" tire is the only one designated as an ST, all others are LT from 17.5 on up to 22.5. I believe the reasoning is that there are no heavy trucks that use a 16" tire, so therefore the 16" is marketed toward trailers. The pictures on their description label show a trailer, school bus, city bus and a delivery truck.
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Old 05-08-2015, 08:05 AM   #79
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Description label S637
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Old 05-08-2015, 08:57 AM   #80
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Description label S637
I don't think the TRA would ever approve a 16" LRG tire for 4080# of load capacity.

Maybe Tireman9 can give us an answer from his TRA experience.

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Old 05-08-2015, 09:03 AM   #81
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That info is different than the S637 tires I just put on my Gateway last month. My tires are marked LT235/85R16 and the weight capacity is less. I guess they make an ST and an LT in this size. I'll take a picture of the sidewall on mine and post it up later.
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Old 05-08-2015, 09:04 AM   #82
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Originally Posted by FastEagle View Post
Here's one for you. In the pictures in post 74 (above) the tire is showing a service description of 129/125L. The tire pix shows a LRG and 14 ply rating.

The tire says it's a ST so only the LRG applies as service descriptions are not official for ST and LT tires (just informative).

Here is a reference showing the same tire with a service description of 126/123L.
Sailun Commercial Truck Tires: S637 Premium Regional All Position

There is a asterisk on 235/85R16 stating it's for trailer service only.



FastEagle
Am in contact with the US distributor trying to get answer to the actual marking of the "*235/85R16 tire."

LI 126 lines up with LT type LR-G tire at 3750# single
LI 129 lines up with ST type LR-G tire at 4080# single
both show 110 psi.

There are other LT type tires marked "For Trailer Service Only"

Now I have no personal knowledge or data on the quality or performance of Sailun brand so cannot attest to their suitability in RV application. I do note that their warranty is 5 times the normal RV warranty and comments from owners seem to be positive so far. Only time will tell, but this may be an option for those with 8,000 GAWR who do not want to or do not have clearance to switch to the 17.5 option.

I do note that Sailun does have some 17.5 tires too.
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Old 05-08-2015, 10:50 AM   #83
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The 215/75R17.5" tires are actually slightly smaller diameter than the 235/85R16" tires, now they are slightly wider, under 1/2" so it is doubtful that there will be any clearance problems.
Frank
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Old 05-08-2015, 12:51 PM   #84
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Ypu better go read the rating on those Marathons again. They are E Rated not R. 65 max on E rated tires.
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