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Old 04-08-2015, 06:13 PM   #1
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Air Bags for Weight Distributing ??

Another option is to get some air bags in the rear of truck. I would definitely get a WD Hitch without the chains. I have the FASTWAY hitch made by EQUALIZER and I love it. I have just over 900 lbs on my tongue with a 31' TT...
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Old 04-09-2015, 09:52 AM   #2
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Another option is to get some air bags in the rear of truck.
How does the affect weight distributing and trailer sway ??
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Old 04-09-2015, 10:00 AM   #3
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...How does the affect weight distributing and trailer sway ??
By raising the rear of the truck which will automatically put more wt on the front.
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Old 04-09-2015, 10:30 AM   #4
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By raising the rear of the truck which will automatically put more wt on the front.
Huh ??

You are saying that by raising the rear of a truck, that distributes more of the trailer tongue weight to the front of the truck ?? How could that be, and just how much weight would it transfer if it is indeed possible ??

Raising the pivot point (rear axle) does nothing to distribute trailer tongue weight to the front axles, unless it would be the tiny sliver of truck above the axle that is moved in front of the axle by raising the truck.
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Old 04-09-2015, 10:54 AM   #5
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Huh ??

You are saying that by raising the rear of a truck, that distributes more of the trailer tongue weight to the front of the truck ?? How could that be, and just how much weight would it transfer if it is indeed possible ??

Raising the pivot point (rear axle) does nothing to distribute trailer tongue weight to the front axles, unless it would be the tiny sliver of truck above the axle that is moved in front of the axle by raising the truck.
If you are on a set of scales and you raise the rear of the truck you will find that the front of the truck will get heavier. Therefore you are transferring weight from the back to the front. Think of it this way total truck weight is 7000 lbs. When rear end low front of truck will come up (less weight on tires). So front weight could be 2800 lbs and rear weight is 4200 lbs. Raise rear front weight changes to 3200 lbs and rear weight is 3800 lbs.
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Old 04-09-2015, 11:32 AM   #6
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Huh ??

You are saying that by raising the rear of a truck, that distributes more of the trailer tongue weight to the front of the truck ?? How could that be, and just how much weight would it transfer if it is indeed possible ??

Raising the pivot point (rear axle) does nothing to distribute trailer tongue weight to the front axles, unless it would be the tiny sliver of truck above the axle that is moved in front of the axle by raising the truck.
It also raises the wdh hitch, therefore increasing the wt transfer, but I will bow to your expertise as what I've actually experienced was all imaginary. Have a nice summer.
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Old 04-09-2015, 11:40 AM   #7
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Originally Posted by MtnGuy View Post
Huh ??

You are saying that by raising the rear of a truck, that distributes more of the trailer tongue weight to the front of the truck ?? How could that be, and just how much weight would it transfer if it is indeed possible ??

Raising the pivot point (rear axle) does nothing to distribute trailer tongue weight to the front axles, unless it would be the tiny sliver of truck above the axle that is moved in front of the axle by raising the truck.
Your kidding right? This is why the the hitch is called a "Weight Distributing Hitch".

This is how Herk has explained it.

How a weight distribution hitch works
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Old 04-09-2015, 12:41 PM   #8
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In defense of my previous posts, he is a synopsis of this thread, which was spun off of a sister thread to keep that thread on topic.

In post #3, OC posted to my question (post #2) on “How does that affect weight distributing and trailer sway ??” in my question to post #1 "Another option is to get some air bags in the rear of truck." regarding sway control and weight distributing from the sister thread.

Quote:
Originally Posted by OldCoot View Post
By raising the rear of the truck which will automatically put more wt on the front.
My reply in post #4:

“Huh" ??

You are saying that by raising the rear of a truck, that distributes more of the trailer tongue weight to the front of the truck ?? How could that be, and just how much weight would it transfer if it is indeed possible ??

Raising the pivot point (rear axle) does nothing to distribute trailer tongue weight to the front axles, unless it would be the tiny sliver of truck above the axle that is moved in front of the axle by raising the truck."


So far, there has been no mention of using WDH in the replies.

Not sure what Post #5 refers to, whether just air bags or a WDH.

In post #6, OC responds to my post #4:

"It also raises the wdh hitch, therefore increasing the wt transfer, but I will bow to your expertise as what I've actually experienced was all imaginary. Have a nice summer."

With that post, now a WDH is introduced into the mix. A WDH was mentioned in the 1st post, but my original in question in post #2 was only about air bags.

So now, let’s talk about raising the rear of a truck with air bags while using a WDH. Raising the rear of a tow vehicle while using a WDH will actually take weight off of the front axle of the tow vehicle. That is why we need to need to raise the rear of the truck with the tongue trailer tongue jack to get the spring bars in place…..it relieves the tension on the spring bars. Going through a dip causes more weight to be distributed to the tow vehicle front axle. Going over a hill in the road will take weight off of the front axle……..the same geometry as raising the rear end with air bags while using a WDH.

Brother Les’ post #7 response to my post #5 refers to a WDH, while I was referring to air bags.

Confused yet ??
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Old 04-09-2015, 05:45 PM   #9
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I this logic goes hand in had with the mpg logic I've heard before. You know, if you drive faster you aren't in the car as long so you won't use as much gas.


I can't wait for the breakdown of how lifting the rear of the truck transfers weight to the front. If you air bags up on the rear to 25psi on an empty truck, yes the rear will raise. So noiw you drop the TT tongue on the WD and it acts like a lever and raises the front of the truck. So do you then add more air? How much air do you add to regain the front weight you lost by placing the coupler on the WD?


So If I measure the front of the truck empty with no TT hitched. Then hitch up sans spring bars and measure again. Now I need to be close to the unhitched number to be setup right. So no need for spring bars right? Just start airing up the bags till the front of the truck is close to its original number. Have I got it right?


So what about the receiver rating that says 500-600lbs without WD? Am I exempt from that? This is confusing. So the airbags take the place of WD for weight transfer but not for the receivers rating?


It would be much simpler if they would just put receivers on trucks that would work with 500-1400lb TW's. Then we could just get airbags to level everything up. Way, way cheaper.


All airbags do is raise the pivot point. When you hitch up the TT the front will still unload the same. Airbags don't have any leverage like spring bars do.
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Old 04-09-2015, 06:02 PM   #10
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goduc,MtnGuy, no one said anything about unhooking the wdh while adding air to the air bags.

I will pose this question to you both. WITH the wdh hooked up and assume that raised the front of the truck 1/2" from normal and it took 200 # off the front and by adding air to the bags, you got the front back down the 1/2", where would the 200# go?
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