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Old 07-03-2015, 07:30 PM   #43
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Dasmoeturhead,
A lot of the heavier 5ers, with the 7000# and 8000# axles either have gone the 17.5" route or they are an option. The Goodyear LR G tires have just been giving them too much grief with premature failures and body work damages. My trailer is on the light side with a GVWR of 16,400# and 7000# axles. Best thing that I did was go with the 17.5" wheels and tires, and get rid of those darn Goodyears.
Frank
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Old 07-03-2015, 10:07 PM   #44
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I haven't heard of any GY g114 failures on the Heartland forum. News to me. I also have 8K axles.
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Old 07-03-2015, 11:24 PM   #45
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I traded a Keystone Alpine 3600RS with 235/85R16E tires for my Trilogy 38RL. I scaled it yesterday on a CAT scale on the way to get a few small items taken care of at the dealer. I was surprised that with no water and just the dishes, etc on board. It weighed in at 16180 lbs with 12760 on the LR H camper tires and pin weight of 3420 calculated on the difference of my drive axle weight from the original weight tkt to the reweigh ticket. The dealership is about 5 miles from the Truck stop scales. Running at a gross weight of 25240 lbs, the Trilogy pulls better than my old unit, but I am thankful that I got the Maxtow package when I speced out my truck last year. I think that I have 8,000 lb axles, but i will check when I get my unit back. One puzzle, i have 4 G114 tires on the ground, but the spare inside on a matching Mag, is a 9640? Tire of matching size and ratings. The service dept is looking into this with the factory.
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Old 07-04-2015, 07:29 AM   #46
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Dasemoeturhead,
I'm sorry, I didn't make myself clear, I was talking about the G614 Goodyear LRG 16" trailer tires that a lot of the units came with from the factory. The G114 LRH 17.5" tires are commercial all position truck tires and they have a good history. The G614's have a history of failure. Sorry for the misunderstanding.
Frank
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Old 07-04-2015, 07:59 AM   #47
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Thank you for the information. I had a blowout on my old unit, which put me on the road to checking tire loading versus the stated capability of the tires. Instead of trying to replace rims and tires to fit into the limited space on the Alpine, I chose to just put 4 new tires of the same size on the unit, and trade for one that has the proper loaded tires and axles on it! It is amazing when you look at the number of units that do not have adequate tires on them from the manufacturer!
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Old 07-04-2015, 08:02 AM   #48
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Having 6 - 16" tires on 6 Lug wheels/hubs gave us few options... If I wanted to change to a larger wheel, I would have had to find 8 lug hubs that would fit the 6k axles as well as brakes, etc..

We chose to go with the Sailun S637 Tires from SimpleTire.com ...
The tires that were on the trailer were Transmaster 235-80-16 and the Sailuns to go on the trailer were 238-85-16, so just a little taller.
The Sailun S637 is an LT tire branded for trailer use only.
The Transmaster tires weighed in at 32# each and the Sailun S637 tires weighed in at 61#.
The Sailun tire beads were easily half again thicker than the Transmasters.
The Sailun tires when stacked on their side made a formidable solid stack of rubber that was not able to be knocked over easily as the sidewalls were very stiff. Not so with the Transmaster tires whose sidewalls were heaver that a passenger car, but were flimsy in comparison to the Sailun S637 tires.
I had the tires balanced dynamically as well and they had no issues.
I haven't towed with them yet so I can't give any road reports.
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Regards - Randy & Dar
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Old 07-04-2015, 09:09 AM   #49
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Quote:
Originally Posted by Franka548 View Post
Dasemoeturhead,
I'm sorry, I didn't make myself clear, I was talking about the G614 Goodyear LRG 16" trailer tires that a lot of the units came with from the factory. The G114 LRH 17.5" tires are commercial all position truck tires and they have a good history. The G614's have a history of failure. Sorry for the misunderstanding.
Frank
No worries Frank. Thanks for clearing that up.
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Old 07-04-2015, 11:09 AM   #50
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Quote:
Originally Posted by Big-Foot View Post
Having 6 - 16" tires on 6 Lug wheels/hubs gave us few options... If I wanted to change to a larger wheel, I would have had to find 8 lug hubs that would fit the 6k axles as well as brakes, etc..

We chose to go with the Sailun S637 Tires from SimpleTire.com ...
The tires that were on the trailer were Transmaster 235-80-16 and the Sailuns to go on the trailer were 238-85-16, so just a little taller.
The Sailun S637 is an LT tire branded for trailer use only.
The Transmaster tires weighed in at 32# each and the Sailun S637 tires weighed in at 61#.
The Sailun tire beads were easily half again thicker than the Transmasters.
The Sailun tires when stacked on their side made a formidable solid stack of rubber that was not able to be knocked over easily as the sidewalls were very stiff. Not so with the Transmaster tires whose sidewalls were heaver that a passenger car, but were flimsy in comparison to the Sailun S637 tires.
I had the tires balanced dynamically as well and they had no issues.
I haven't towed with them yet so I can't give any road reports.


Regards - Randy & Dar
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Sent from my iPad using iRV2 - RV Forum
I ran the Sailun S637 on our last 5th Wheel, great tire.
We made several coast to coast trips with them, no problems at all.
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Old 07-04-2015, 11:27 AM   #51
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Quote:
Originally Posted by Rob_Fla View Post
I ran the Sailun S637 on our last 5th Wheel, great tire.
We made several coast to coast trips with them, no problems at all.

So good to hear - thank you!!!


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Old 07-06-2015, 08:13 PM   #52
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Just had a blow out today 20 mins into our drive home on our Outback 2013 5th wheel going under 60 mph on the left back tire. Tires are ST's 235 80r16 E. Confirmed at 80 psi and not over loaded. Tire blew out on the middle of tire and inwards. Second blow out hole as well but smaller. We estimate not more than 1000 miles on these. Same type of situation happened with ST's on our TT before yr 4. Going with the Goodyear Unisteels. This is ridiculous they put these tires on heavy 5th wheels. And Amazon sells these and great reviews. Not screwing around on tire choices and going to fork out the money. On a positive note. First time using Good Sam and was impressed.
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Old 07-06-2015, 09:20 PM   #53
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tireman9 wrote:
Quote:
Interesting idea that say an LT235/85R16 LR E with a load carrying capacity of 3042# is some how able to handle the load of the trailer better than an ST235/85R16 LR-E with a load capacity of 3640#.

The load placed on the tires would of course be the same as the trailer doesn't know what kind of tire is under it.

Somehow my Degree in Mechanical Engineering and 40 years experience as a tire design and quality engineer led me to believe that 3,640 was greater than 3,042.
My ST load range tires rated at 3500#s inflated to 80#s were blowing up.

Changed to LT load range G tires rated at 3250#s inflated to 95 pounds (105 is max) and they have been trouble free (12,000 miles).

The LT tire is rated lower because of all the different intended uses (steer, drive, trailer) have to be considered. The actual capacity, if tested for use for trailers only would be north of 4000#s.

Air holds the weight. Tires hold the air.

FWIW, I settled on 95 pounds (70 degrees) because of the way temperature affects tire pressure. My TPMS shows stable temps only a few degrees above ambient temps.

Youse guys changing to tires that can be inflated to pressures above 80 pounds may need to change your valve stems. My trailer wheels were rated for 110 psi but, the wheels came with 80 psi valve stems.
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Old 07-06-2015, 09:26 PM   #54
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Yep u need to change to steel valve stems for 110 psi's.
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Old 07-06-2015, 09:41 PM   #55
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Quote:
Originally Posted by andy29847 View Post
tireman9 wrote:

My ST load range tires rated at 3500#s inflated to 80#s were blowing up.

Changed to LT load range G tires rated at 3250#s inflated to 95 pounds (105 is max) and they have been trouble free (12,000 miles).

The LT tire is rated lower because of all the different intended uses (steer, drive, trailer) have to be considered. The actual capacity, if tested for use for trailers only would be north of 4000#s.

Air holds the weight. Tires hold the air.

FWIW, I settled on 95 pounds (70 degrees) because of the way temperature affects tire pressure. My TPMS shows stable temps only a few degrees above ambient temps.

Youse guys changing to tires that can be inflated to pressures above 80 pounds may need to change your valve stems. My trailer wheels were rated for 110 psi but, the wheels came with 80 psi valve stems.
It's hard to change a mind set that takes the tire manufacturer's recommendations over the vehicle manufacturer's recommendations.

Here are a couple to ponder. If your OE tires provided 3500# of load capacity than that's a vehicle manufacturer's minimum requirement for your trailer. So your larger tires should still be inflated to provide that 3500# of load capacity. --- If your replacement tires are steel cased 16" LRG tires it's very likely the minimum rim width requirement for them is 6 and 1/2".

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Old 07-07-2015, 07:19 AM   #56
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Quote:
Originally Posted by fmoore View Post
Just had a blow out today 20 mins into our drive home on our Outback 2013 5th wheel going under 60 mph on the left back tire. Tires are ST's 235 80r16 E. Confirmed at 80 psi and not over loaded. Tire blew out on the middle of tire and inwards. Second blow out hole as well but smaller. We estimate not more than 1000 miles on these. Same type of situation happened with ST's on our TT before yr 4. Going with the Goodyear Unisteels. This is ridiculous they put these tires on heavy 5th wheels. And Amazon sells these and great reviews. Not screwing around on tire choices and going to fork out the money. On a positive note. First time using Good Sam and was impressed.
Can you provide a few pictures of the failed tire? Many people call any tire failure a "blowout" which can be misleading when in fact many such tires really have experienced a Run Low Flex Failure.

Also want to confirm your TPMS gave no warning of an air leak.

It might help us offer a more informed suggestion on a better tire to use if we knew the measured loading on each tire.
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