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Old 03-10-2014, 03:46 PM   #1
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Class A Coach towing a enclosed car trailer

This is a question about tongue weight on the rear of a 41' Newmar w/ air ride, As far as weight distribution, with the air ride system on these Coach's, there is never no sagging the rear end with a trailers tongue weight.....air ride valves sense the added weight and adjust all the time to hold a set ride height, and I have read that a weight distribution system "distributes the weight" of the trailer (sagging due to tongue weight) but does nothing to change the tongue weight, very little if any. So......with no sagging of the rear end, no need to level (air suspension does this) is there a need for weight distribution system on these big Coach's Has anyone ever pulled a big trailer without? and then found out that they needed the system?
From Etrailers web page:
When Is Weight Distribution Needed?

You would likely benefit from a weight-distribution system if:

  • Your trailer weight (GTW) is more than 50 percent of your vehicle's weight (GVWR)
  • The rear of your tow vehicle sags when the trailer is hooked up
  • You experience trailer sway
  • Your tow vehicle headlights point upward
  • You find it difficult to steer or stop your rig
  • You want to tow to the highest capacity allowed by your vehicle's trailer hitch setup
I have no problem buying anything I need, I just don't want to buy things I don't need.......I am just wondering about the "true" benefits of this setup? When loaded, hooked up, the whole rig will already sit level.....Would a weight distributing system help at all, and if what would it do and the benefits, I am thinking and trying to understand this.
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Old 03-10-2014, 11:51 PM   #2
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I've seen people use them on air bag coaches, but my beaver says specifically not to. If you think about it, you hook up and the rig reaches set ride height, you tighten the weight bars, shifting the weight off the hitch, and the suspension adjusts again.....

With a weight distributing hitch, it HAS to (effectively) take off tongue weight. With the trailer on the ball and the bars loose, there's not as much weight on the front wheels of the tow vehicle. The bars shift weight aft (by putting an additional spring between the truck and trailer) off the ball which allows the front to return to a more normal position ("shifting weight" to the front), as well as leveling the trailer so the tires there are more equally loaded.

I bought a set for my 28' toy hauler when I had a standard-duty 3/4 ton and they helped immensely - it was virtually undrivable without them. When I got a 2500HD, where the suspension was more appropriately sized to the load, the only benefit I saw was the anti-sway (I had a reese cam system).

I tow a 5,000lb 18' box behind the Beav, have also towed U-hauls, and a friends BMW Z-3, two sets of tires, 20 gallons of fuel, and all his other racing junk on a 20' flatbed. All 3 towed pretty much the same, none with weight distributing bars.
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Old 03-11-2014, 10:35 AM   #3
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Interesting.......

Quote:
Originally Posted by VanDiemen23 View Post
I've seen people use them on air bag coaches, but my beaver says specifically not to. If you think about it, you hook up and the rig reaches set ride height, you tighten the weight bars, shifting the weight off the hitch, and the suspension adjusts again.....

With a weight distributing hitch, it HAS to (effectively) take off tongue weight. With the trailer on the ball and the bars loose, there's not as much weight on the front wheels of the tow vehicle. The bars shift weight aft (by putting an additional spring between the truck and trailer) off the ball which allows the front to return to a more normal position ("shifting weight" to the front), as well as leveling the trailer so the tires there are more equally loaded.

I bought a set for my 28' toy hauler when I had a standard-duty 3/4 ton and they helped immensely - it was virtually undrivable without them. When I got a 2500HD, where the suspension was more appropriately sized to the load, the only benefit I saw was the anti-sway (I had a reese cam system).

I tow a 5,000lb 18' box behind the Beav, have also towed U-hauls, and a friends BMW Z-3, two sets of tires, 20 gallons of fuel, and all his other racing junk on a 20' flatbed. All 3 towed pretty much the same, none with weight distributing bars.
Thank you for your post, hopfully I will hear for more folks on the subject and get somemore thoughts on it, thanks.........
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