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Old 09-22-2015, 09:54 PM   #41
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Well now that was an interesting read. I just read that link from Gyrogearloose. According to Carlisle, a well known (even if you dont care for their tires) tire company, and I quote "The combined capacity of all of the tires should exceed the loaded trailer weight by 20 percent"

The total weight rating of my tires dont even match the weight of the trailer let alone exceed it. I guess FR dosen't talk to its suppliers.
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Old 09-22-2015, 09:59 PM   #42
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Originally Posted by SnR Gaskell View Post

and I quote "The combined capacity of all of the tires should exceed the loaded trailer weight by 20 percent"

The total weight rating of my tires dont even match the weight of the trailer let alone exceed it. I guess FR dosen't talk to its suppliers.

I know.
Mine are rated at 3520.
X4 is 1480.
Rig is 15500 gross.

I guess they are relying on the extra on the pin.
No good in my books.


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Old 09-22-2015, 10:27 PM   #43
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Originally Posted by Kenny kustom View Post
I know.
Mine are rated at 3520.
X4 is 1480.
Rig is 15500 gross.

I guess they are relying on the extra on the pin.
No good in my books.


2008 F350 CCSB V10
2016 Sabre 36QBOK
I think you missed a zero:

3520 x 4 = 14080

Not QUITE as bad as it first appeared!
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Old 09-22-2015, 10:49 PM   #44
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Originally Posted by Kenny kustom View Post
I know.
Mine are rated at 3520.
X4 is 1480.
Rig is 15500 gross.

I guess they are relying on the extra on the pin.
No good in my books.
They're also relying on equal weight on each tire. This isn't true, it's the one tire with the greatest load that needs to be considered.

No matter how hard you try to balance your trailer, tire loads will not be equal. This starts with the weight of slide outs (with couch) on one side and not on the other.

In my case with rubber torsion axles, I doubt the axle forces will be equal even if trailer loading were perfect. Rubber doesn't make an ideal spring. Each half axle will have a slightly different load for a given deflection. It's just a question of how much they're different.

And what happens if one tire is 2psi high and the others are 2 psi low? I bet it will take more of the load.

The 20% rule makes good sense when you think about all the variables that can unbalance the tire loading.
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Old 09-22-2015, 11:09 PM   #45
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It is not just the tires that FR. skimps on. According to Lippert frame comp. FR skimps on there frames. FR buys frame that are too light for the job they are making them do. I was told this by Lippert when I was having trouble with my slide out. I finally found someone at Lippert that could tell me how to fix the slide out frame. I am just hopping that I don't have any problems with the frame. As I have the same thing with the tires as everyone else not heavy enough tires, I am also changing to Disc brakes, because I don't think they are big enough. My rig dose not want to stop, the way it is.
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Old 09-23-2015, 11:40 AM   #46
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Originally Posted by Kenny kustom View Post
I know.
Mine are rated at 3520.
X4 is 1480.
Rig is 15500 gross.

I guess they are relying on the extra on the pin.
No good in my books.


2008 F350 CCSB V10
2016 Sabre 36QBOK
I have a 2015 QBOK and the sticker says mine is only 14665
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Old 09-23-2015, 12:44 PM   #47
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I have a 2015 QBOK and the sticker says mine is only 14665


My bad.
You are correct. Where did I get the 15500 from??


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Old 09-23-2015, 02:26 PM   #48
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My bad.
You are correct. Where did I get the 15500 from??


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Old 09-23-2015, 02:35 PM   #49
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Max fifth tow rating of the truck I think!!!


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Old 09-23-2015, 05:52 PM   #50
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Originally Posted by Ditchdigger View Post
It is not just the tires that FR. skimps on. According to Lippert frame comp. FR skimps on there frames. FR buys frame that are too light for the job they are making them do. I was told this by Lippert when I was having trouble with my slide out.
I'm having a little trouble with this allegation. When there are frame problems, Lippert has to fix them, not FR. The bad reputation falls back on Lippert, not FR. If someone get's killed because a frame fails, they sue Lippert (and FR).

I have trouble believing that FR is truly overloading a Lippert frame. I'm guessing this is another urban legend.
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