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Old 11-26-2014, 05:32 PM   #1
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Playing the scale game

Getting ready to pull out on a trip Friday and had the rig all hooked up and loaded so I decided to make a run to the local scale just to see where I am on my weights. I knew I should have plenty of TV for my TT but till you weigh, it's all a guessing game.

Specs first:
Truck GVWR 10,000
Truck GCWR 22,000
Truck FAWR 5,200
Truck RAWR 6,100
Truck Tow Rating: 12,500
Trailer GVWR 10,000
Trailer (advertised) Dry Weight: 5,997
Trailer (advertised) Dry Hitch Weight 756 (12.6%)

Weights were taken with truck and trailer in traveling condition. Full fuel load, 2 occupants, WDH, all gear, luggage and groceries on board, 1/2 tank of water, black & grey tanks empty. I didn't axle the truck by itself, but prolly should have.

Weights:
Gross:15,100
Truck: 7,740
Front Axle: 4,380
Rear Axle: 4,380
Trailer: 7,360
Trailer Axles 6,340
Tongue: 1,020 (13.8%)

I'm surprised that:
My gross isn't heavier than it is,
My truck outweighs my trailer,
My front and rear axle weights came out identical.

My conclusions:
I'm plenty good on my GCWR with 4,900 to spare
I'm ok on the FAWR with 820 to spare
I'm good on the RAWR with 1,720 to spare
I could probably ease up on the WDH some and shift some weight to the rear axle.
I'm a little high on tongue weight which would be a strike against easing up on the WDH.

I guess I'm all set.
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Old 11-27-2014, 05:22 AM   #2
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Numbers look good LC.
Always nice to know that there's plenty of breathing room.

Have a safe trip,

Rich
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Old 11-27-2014, 12:55 PM   #3
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Quote:
Originally Posted by L.C.Gray View Post
I'm a little high on tongue weight which would be a strike against easing up on the WDH.
Looks close to perfect to me at 13.8 %. Since you aren't even close to the GVWR of the tow vehicle, why would you want to reduce tongue weight percent?

How did you determine wet and loaded tongue weight? Tongue weight scale?

Quote:
I guess I'm all set.
Looks good to me. I'm glad to see someone with "enuff truck" for their trailer.
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Old 11-27-2014, 06:54 PM   #4
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Quote:
Originally Posted by SmokeyWren View Post
How did you determine wet and loaded tongue weight? Tongue weight scale
Gross weight minus the truck weight gives you the trailer weight. Then trailer weight minus trailer axle weight to determine actual tongue weight.

Just thinkin that I'd rather be down towards the bottom of the accepted TW scale at 12%. The truck seems to be sprung a little light based on rear squat/nose hike. I cinched up an extra link on the bars from where I originally set it up on this truck and that produced these numbers. I Didn't weigh out prior to the change.
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Old 11-27-2014, 08:17 PM   #5
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Quote:
Originally Posted by L.C.Gray View Post
Gross weight minus the truck weight gives you the trailer weight. Then trailer weight minus trailer axle weight to determine actual tongue weight.
Put on your thinking cap. How did you get truck weight? You stated "I didn't axle the truck by itself, but prolly should have."

To get tongue weight without a tongue weight scale, you must weigh the rig twice. Once with the trailer but without the spring bars, and again without the trailer. Then subtract the combined weight on the two truck axles without the trailer from the combined weight on the two truck axles with the trailer but without the spring bars. The answer is hitch weight.

Then subtract the gross weight of the truck without the trailer from the gross weight of the rig including the trailer to get trailer weight. Verify that calculation by adding trailer axles weight to tongue weight.
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Old 11-27-2014, 10:33 PM   #6
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Quote:
Originally Posted by SmokeyWren View Post
Put on your thinking cap. How did you get truck weight? You stated "I didn't axle the truck by itself, but prolly should have."
I weighed the truck. I just didn't axle the truck by itself. I took 4 seperate weights on the scale. Truck weight was in the list. All the rest is math.

I weighed with the bars in place because I won't be driving down the road without them. Do I have an actual static hitch weight, prolly not, but I have the true effective tongue weight being put on the truck. These are numbers are derived from the actual down the road condition of my rig and are really the ones that matter.

As far as the formula to pull out the tongue weight I did what you said even though we might have said it differently.
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