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Old 01-24-2015, 08:07 AM   #1
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Math wizard needed to help crunch the numbers.

Here are the numbers please help with computation. 2015 F350 4X4 SRW short bed. Max GVWR 11,500 GCWR 23,500. Weighed truck at scale with food, fuel, DW, dogs, drinks, kitchen sink etc Steer axle 5200....drive axle 3970...= 8920. Trailer we are looking at: dry weight 12,227..cargo 3273...= 15,500. Hitch is 2240.

Thanks......
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Old 01-24-2015, 10:06 AM   #2
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If you look at just the numbers provided such as the vehicle weight and the gross trailer weight you would be over the GCVW of your truck. That is the dry weight and the cargo weight added together. But what you really need to know is the actual trailer weight with everything loaded in the trailer to make the actual decision if you will be over or not.

I know that some of the trailers in their cargo weight are including a washer and dryer as part of this maximum number. I for one would not carry the washer and dryer in the trailer; since we do not full time or are snowbirds. We do take extended trips but Laundromat either at the campground or in a town somewhere.

As an example I will list my weights from a certified scale. This is for a 2008 Ram Mega cab, 6.7L Cummins, auto 4X4, towing a 2010 318SAB Cougar 5th wheel, fully loaded for two weeks of traveling and a full tank of fuel with DW and myself. There is no water or fluids in the holding tanks since this is unnecessary weight to carry for me.

Steer Axle 4,940LBS; Drive Axle 5,160LBS (includes pin weight of trailer): trailer axles 8,140LBS and the total gross weight of 18,240LBS. The truck total gross combined weight rating is 20,000LBS and the front axle gross weight is 5,200 lbs and the rear is 6,200Lbs. So as you can see I am under the gross weights but I am not max out on the carrying capacity of the trailer.

Oh; by the way here comes the weight police!!!

Jim W.
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Old 01-24-2015, 10:12 AM   #3
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Scale is wrong like most times. I bet your truck is no more then 7600 lbs like mine with 2 passenger. No way it's 8900 lbs empty.
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Old 01-24-2015, 11:14 AM   #4
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Quote:
Originally Posted by Captainkoop View Post
Steer axle 5200....drive axle 3970...= 8920.
5200 + 3970 = 9170, not 8920, so I'll agree your math skills need some help.

My '99.5 F-250 diesel CrewCab longbed 4x2 weighed about 8,000 pounds including a full tank of diesel, toolbox full of tools and jacks and other heavy stuff, and 5er hitch with no cargo except Darling Wife and a puppy dog. The newer Fords are heavier than my '99.5, and 4x4s add about 400 pounds of road-hugging weight, and your shorty bed weighs about 200 pounds less than my 8' bed. But if your truck grosses 9,170 before you tie onto the trailer, then you are probably hauling a lot of kitchen sink.

So assuming your truck actually weighs 9,170, that leaves 2,320 for max pin weight without being overloaded.

Quote:
Trailer we are looking at: dry weight 12,227..cargo 3273...= 15,500. Hitch is 2240.
Your hitch weight (pin weight or kingpin weight) will be a lot more than 2240. If you load the trailer to 14,000 and your hitch weight is 17%, that's 2380. Overloaded. But only a few 5ers have as little as 17 percent pin weight. Most have 18 to 20 percent pin weight. Your dry trailer has 18.3% dry hitch weight, so you can expect to have a wet and loaded hitch weight of 18 to 20 percent. So if you keep the gross trailer weight down to 14k, that's 2,520 to 2,800 pin weight. If your actual pin weight is 2,650, that's 330 pounds over the GVWR of your F-350. Not a disaster, but definitely overloaded. But if your DW decides to load another kitchen sink into the trailer and get it up over 15,000 pounds gross trailer weight, then you'll be severely overloaded.

What would I do? Assuming your scale ticket says your wet and loaded truck without the trailer grosses 9,170 pounds, I would look for a 5er with not more than 11,200 GVWR. That allows for a 20 percent pin weight when the trailer is wet and ready for the road. If you settle on a trailer with less than 20% wet and loaded pin weight, then you'll have a bit more wiggle room. Or if you settle for a trailer with less than 11,200 GVWR, then you'll probably have a bit more wiggle room. Wiggle room is definitely a lot safer than being overloaded.

Ignore those that claim you don't need to worry about exceeding the Ford weight limits.
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Old 01-24-2015, 11:34 AM   #5
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Scale is wrong like most times. I bet your truck is no more then 7600 lbs like mine with 2 passenger. No way it's 8900 lbs empty.
Maybe re read his post. He said it was full of people and cargo.

"Weighed truck at scale with food, fuel, DW, dogs, drinks, kitchen sink etc"
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Old 01-24-2015, 11:40 AM   #6
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Its not 8900 empty, he says it is fully loaded for camping.
Joe
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Old 01-24-2015, 11:46 AM   #7
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Here are the numbers please help with computation. 2015 F350 4X4 SRW short bed. Max GVWR 11,500 GCWR 23,500. Weighed truck at scale with food, fuel, DW, dogs, drinks, kitchen sink etc Steer axle 5200....drive axle 3970...= 8920. Trailer we are looking at: dry weight 12,227..cargo 3273...= 15,500. Hitch is 2240.

Thanks......
Ok here ya go. Your math was wrong. Your truck weighs 9,170# per your numbers.

RV dry 12,227# plus cargo 3,273# will give you a loaded weight of 15,400#

Now take a 20% minimum pin weight of 3,080# and add that to your rear axle number and at a minimum will be 7,050# actually 150# of that or so will transfer to the front axle. Now a more realistic weight of 25% pin will be 3,850# add that to your rear axle 7,820#. What are your two rear tires rated for?

Wait there is more. You say your GCVWR is 23,500#. Add your truck weight of 9,170# to RV weight of 15,400# and now you have a combined load of 24,570#.

I would say you are in Dually territory. Or a smaller lighter RV.
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Old 01-24-2015, 04:56 PM   #8
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Sorry my bad..... Typo's....... Gross weight of truck is8920. 😱
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Old 01-24-2015, 05:00 PM   #9
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Thanks ya'll I will have to downsize to a bit more logical size. DW will be unhappy again...
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Old 01-24-2015, 10:46 PM   #10
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Thanks ya'll I will have to downsize to a bit more logical size. DW will be unhappy again...
Better unhappy than possibly unsafe.
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Old 01-25-2015, 12:26 PM   #11
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It's easy, buy a Dually tow most anything you want. See how easy that was?
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