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Old 08-09-2018, 01:30 AM   #11
CWtheMan
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Quote:
Originally Posted by busterbrown View Post
Load carrying capacity and any potential reserve capacity are not based on a tire's speed ratings. Sailun s637 and Goodyear g614s are heavy trailer tires speed rated for only 75 mph. Not clearly 106 mph but they have a great reputation of supporting the load.
All tires have a maximum load capacity molded on their sidewalls. Now days just about all ST tires have speed letters above "K".

The relationship with a tire's speed rating and load rating goes sort of like this. The tire will support it's full load capacity up to it's speed rating. Thereafter, it starts degrading rapidly cutting months and even years off its potential life expectancy. (Depending on how close it is to its max load capacity).
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Old 08-09-2018, 01:49 AM   #12
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Originally Posted by ingram View Post
My new 5th wheel came with a very different looking set of Trailer Kings on it than the ones I immediately replaced on my last TT. These are called Trailer King RST, instead of Trailer King ST. I looked them up and they are 10 ply, E rated, and the website claims, has a 5 year warranty. They still look cheap to me, but has anyone else got these? Same old, same old, junk?
IMO, a lot of the China manufacturers will add a little something to their brands just to make us think they've upgraded the brand. In this case they've added a couple of new sizes, some with higher load ranges and all sizes carry a "M" speed rating.

The first trailer tires I saw with RST on their sidewalls were the GY G614s. Their RST acronym means Regional Service Trailer.

http://trailerkingtires.com/tires/La...g-product-line
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Old 08-09-2018, 04:34 AM   #13
ingram
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I really liked the Goodyear Endurance on my little TT. Better safe than sorry. I will probably swap to those when we get back from FL.
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Old 08-09-2018, 07:31 AM   #14
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Originally Posted by CWtheMan View Post
Doesn't your certification label call for LT tires? Just about all 2005 Keystone trailers in that weight class had LT tires.
No cert label on 2005, but build sheet I got from Keystone state it was shipped with LT 235/85-16E’s.
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Old 08-09-2018, 12:45 PM   #15
Laredo Tugger
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I'm trying to figure out what (brand) of tire I have on my 2017 Laredo 350FB that I bought used. The only name on them is "Provider" ST 235/80R16 Radial Load Range E Made in China. There is no speed rating anywhere to be found on the tires. Anybody know? They are in great shape and I keep them covered and off the dirt.
Should these be replaced or are they a "quality" china bomb?
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Old 08-09-2018, 01:40 PM   #16
JRTJH
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It's made by (well, marketed by) Taskmaster brand tires.

Specs:
•Fits 16" x 6" rims
•Tire size: ST235/80R16◦Section width: 9.25"
◦Outer diameter (when inflated): 30.79"
•Capacity:◦Load range: E
◦Ply rating: 10
◦Maximum load:◾Single tire: 3,520 lbs at 80 psi
◾Dual tires: 3,000 lbs at 80 psi
•Tread depth: 11/32"
•Max speed: 81 mph (speed rating M)
•2-Year limited warranty

https://www.etrailer.com/Tires-and-W...M2358016E.html
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Old 08-09-2018, 02:23 PM   #17
Laredo Tugger
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Well there you go!
I was just on the etrailer site ordering some stuff but did not think of chasing down that tire info like you did.
Thank you very much. Most helpful.
RMc
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Old 08-09-2018, 05:04 PM   #18
CWtheMan
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Originally Posted by rhagfo View Post
No cert label on 2005, but build sheet I got from Keystone state it was shipped with LT 235/85-16E’s.
They used cheap decal labels back then. Our 2003 Everest had one and it wore off in about 6 years. I requested a new one from Keystone and they sent me a metal one that bonded right over the old one. Much nicer and still legible.
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Old 08-16-2018, 10:56 AM   #19
johnlewis
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ST tires are supposed to be used on travel trailers and 5th wheels. Check out https://rvingwithmarkpolk.com/2012/1...s-vs-lt-tires/
When we bought our 2006 Montana a couple of years ago, the tires needed replacing, because the tires on the unit were 6 years old. I started searching on line, and found Load Range G, ST tires at Discount Tire (the trailer was originally supplied with Load Range E). They are a Hartland brand, rated for 81 mph. After 2 years and 20,000 miles, they are doing well.
There are several other websites that outline why you should use ST tires, not LT tires on a TT or 5er.
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Old 08-16-2018, 01:35 PM   #20
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Sailun S637 have the best rep and are on new Montana 5ers. The 235/80/16 rated at 4080# and the 235/85/16 are rated at 4400#at 110 psi. The company has a psi/weight chart down to 80 psi. Made in China by a Canadian company, not farmed out, in their factory. Best rep and best price....
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