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Old 10-18-2018, 05:22 PM   #1
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Capacity and weight questions

The Wolf Pack 24pack14+ info says:
GVWR = 9985
UVW = 6373
Hitch weight = 1015
CCC = 3612

How is the hitch wt. number established? It is 11% of the GVWR. Is it a target number when the CCC is maxed out?

And how do you accurately determine true hitch weight? Can I use the rear axle weight of my TV previously weighed unhitched and subtract from rear axle weight measured when hitched?

Thanks, sorry for the dumb questions.
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Old 10-18-2018, 05:31 PM   #2
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I do not know how Forest River establishes hitch weight so I plan for 15% of TT's GVWR Using rear axle weight alone is, IMO, a close estimate. I'd prefer entire truck loaded with family and gear to be weighed hitched and unhitched. Having said that, it is not usual practice and may not be accurate. There many threads describing the preferred procedure in this forum.
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Old 10-18-2018, 05:42 PM   #3
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I'll search for how to weigh your rig. I was just using a free, roadside scales that was barely long enough to weigh my TV.

Why 15%? Would that be different for different types of TT's? Like toyhauler vs. conventional TT?
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Old 10-18-2018, 05:43 PM   #4
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The layout on your trailer is almost identical to mine with matching dry weights and cargo capacity. Looking at your signature we do similar things (haul motorcycles) so more similarities in loading. That being said the only way to know for sure is to take weights with your trailer and loads...

The hitch number is established by weighing it and it will change a great deal with your toyhauler from loaded to unloaded. The sticker on the side of my trailer was right on the money when dry. When wet its a whole new animal...

I weigh the tongue weight every time I have pulled the trailer (you can buy a scale). I have seen tongue weights from about 950 to 1500lbs. These variations make towing this trailer with a 1/2 ton truck problematic.
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Old 10-18-2018, 05:47 PM   #5
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You cannot use rear axle weight with/without trailer to determine hitch weight, the difference will not be the hitch weight due to weight also transferred off the front axle.

For example, I have my empty and hitched w/o WDH numbers as follows...

Empty:
Front - 3200
Rear - 2680

Hitched w/o WDH:
Front - 2940
Rear - 3600

If you subtract 2680 from 3600 you get 920lb. That is not the tongue weight, that's roughly 40% more than the actual tongue weight. Why? Because when the trailer is hitched up it raises the front and takes weight off the front axle but that weight doesn't magically disappear, it moves to the rear axle.

So, to get the actual tongue weight you either need a scale to weigh the actual tongue weight or you need to have the truck weighed empty to get steer/drive weights with no trailer and then have it weighed again with the trailer hitched up but without the WDH bars in place to get the loaded steer/drive axle weights on the truck, then subtract the empty weights from the hitched weights.

If you're trying to determine if you have enough payload capacity, calculate 15% of the GVWR. That means you could have roughly 1,500LB of tongue weight with that trailer. That is a heavy bumper-pull trailer. That is more trailer than your Tundra can handle, unfortunately.
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Old 10-18-2018, 06:00 PM   #6
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Quote:
Originally Posted by 2thdr View Post
I'll search for how to weigh your rig. I was just using a free, roadside scales that was barely long enough to weigh my TV.

Why 15%? Would that be different for different types of TT's? Like toyhauler vs. conventional TT?
What I have read on these forums is that tongue weight should be >= 10% and <= 15%. So if 15% is a reasonable maximum then if I can handle it, I'm good (all other factors being within parameters.)
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Old 10-18-2018, 07:47 PM   #7
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Use a bathroom scale and some 4x4's.. Plenty of youtube videos on it and it is pretty accurate. Then you'll know your hitch weight.
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Old 10-18-2018, 11:40 PM   #8
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Take it to a truck stop and do a series of weighings:
How to Weigh a Travel Trailer | Learn To RV

Then take the weigh slips and fill the Actual Weights calculator on:
Towing Planner - towing capability calculators
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Old 10-19-2018, 07:12 AM   #9
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Quote:
Originally Posted by 2thdr View Post
The Wolf Pack 24pack14+ info says:
GVWR = 9985
UVW = 6373
Hitch weight = 1015
CCC = 3612

How is the hitch wt. number established? It is 11% of the GVWR. Is it a target number when the CCC is maxed out?

And how do you accurately determine true hitch weight? Can I use the rear axle weight of my TV previously weighed unhitched and subtract from rear axle weight measured when hitched?

Thanks, sorry for the dumb questions.
You can calculate from those rear axle weights tongue weight.

(Wheelbase + rear axle to ball distance)/Wheelbase= hitch factor
(RAW with TW - empty RAW)/hitch factor= hitch weight
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Old 10-19-2018, 07:51 AM   #10
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The factory numbers are dry weights from the factory. No gas, batteries, water etc.

The hitch weight should also be there. Between 10-15%. Should always be that number.

To calculate the changes in loading is a statics question. Generally a junior level engineering course. You need length from pivot points. A lot of effort. I can do it, most cannot. Simply too much effort.

For $13 a trip to the cat scale answers everything.

You kind of have to learn to balance the loads you add.

I have noticed that toy hauler fivers usually have high hitch weights assuming you will load the rear. Therefor dry I would assume the hitch weights are too high in anticipation of heavy toys in the rear. Balances out.
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