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Old 06-19-2016, 10:39 AM   #1
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Axle Ratings

May be a dumb question, I am researching several different models by different manufactures. All of them have combined axle ratings 1-2 thousand pounds less than their GVWR? Can someone explain this for me?

Thanks Paul
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Old 06-19-2016, 10:43 AM   #2
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Pin weight accounts for the remainder.
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Old 06-19-2016, 11:14 AM   #3
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Exactly!

So consider that you have a rig with a GCWR of 14,600 and two 6,000 pound axles. The manufacturer is relying on the tow vehicle to carry the 2,600 pin weight.
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Old 06-19-2016, 01:39 PM   #4
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Makes sense now. Thanks for the replies.
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Old 06-19-2016, 07:34 PM   #5
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I think this is a problem... In my honest opinion, you need the next larger axles, wheels and tires to have the safety margin you really need...
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Old 06-19-2016, 07:41 PM   #6
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I think this is a problem... In my honest opinion, you need the next larger axles, wheels and tires to have the safety margin you really need...
Especially the tires. They are way to close to the max. And usually crap. If buying new unit I would get better and heavier tires as part of the deal.
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Old 06-19-2016, 09:52 PM   #7
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Me personally, I want axles that can handle the whole weight as well as the tires. I like my math on my side. Thats why my truck is TOO big.
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Old 06-19-2016, 09:58 PM   #8
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Me personally, I want axles that can handle the whole weight as well as the tires. I like my math on my side. Thats why my truck is TOO big.
That makes no sense. The largest axles are 8K. They don't put 8K axles on 16K trailers. You will need to do that after purchase. Plus, the trailer will ride like a buckboard with stiff 4K springs loaded around 12.5K. They must factor the pin weight to compensate.
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Old 06-23-2016, 12:44 AM   #9
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This plays into a question I have. When parked and leveled do the jacks take enough weight off of the axles to keep below the rated weight or can some be taken up by a king pin tripod (though I thought those were more to help prevent "wiggling")?
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Old 06-23-2016, 12:54 PM   #10
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This plays into a question I have. When parked and leveled do the jacks take enough weight off of the axles to keep below the rated weight or can some be taken up by a king pin tripod (though I thought those were more to help prevent "wiggling")?
The front jacks take off the same approximate weight as the kingpin would when hitched to the truck. The trailer axles will almost always have the same weight on them hitched or unhitched, unless you move a significant amount of weight to a different location, front or back, in the trailer.

A tripod is only for stabilizing a rig, not to handle any significant weight.
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Old 06-23-2016, 02:05 PM   #11
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That's why I like the 6-point leveling system on the higher end trailers. This too will carry some of the load of the axles/tires when the struts are down, putting less stress on the suspension. In fact you can pick up the entire coach with the leveling system if needed. I have done this to change out a tire at the F.R.O.G. rally last year.
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Old 06-23-2016, 02:20 PM   #12
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That makes no sense. The largest axles are 8K. They don't put 8K axles on 16K trailers. You will need to do that after purchase. Plus, the trailer will ride like a buckboard with stiff 4K springs loaded around 12.5K. They must factor the pin weight to compensate.
Actually my former DRV had a dry of 12kish and gross of 17k it had 8k axles from factory.
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Old 06-23-2016, 04:30 PM   #13
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Actually, you made my point. Your DRV had a 17.5K GVWR and the axles were 8K.
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Old 06-23-2016, 06:57 PM   #14
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Airmech...truck too big??? There is no such thing. A truck too big is like a unicorn.
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