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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > Where does the weight go to when using wd hitch?

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path1

Varies with weather

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Posted: 05/12/19 11:12pm Link  |  Quote  |  Print  |  Notify Moderator

If tongue weight scale says 930 pds and then you hook up to to hitch ball and then load up wd spring bars...what happens? Where does that 930 pds go?

wnjj

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Posted: 05/12/19 11:14pm Link  |  Quote  |  Print  |  Notify Moderator

path1 wrote:

If tongue weight scale says 930 pds and then you hook up to to hitch ball and then load up wd spring bars...what happens? Where does that 930 pds go?

Practically speaking, some goes onto the tow vehicle front axle and some goes onto the trailer axle(s).

Technically speaking though, all of it stays there but the WD hitch creates an upward force at the ball which is countered by added downforce at the tow vehicle front and trailer axles. This lightens the effect of the trailer’s tongue weight on the rear of the vehicle.

path1

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Posted: 05/12/19 11:35pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for info. Washing tow vehicle this weekend,the stock hitch label says 1000 max tongue weight. Never had a problem (and safe for now) but think I'll get bigger rating hitch.
Thanks.

valhalla360

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Posted: 05/13/19 01:27am Link  |  Quote  |  Print  |  Notify Moderator

path1 wrote:

Thanks for info. Washing tow vehicle this weekend,the stock hitch label says 1000 max tongue weight. Never had a problem (and safe for now) but think I'll get bigger rating hitch.
Thanks.


Hitches typically have two ratings...with and without WD.


Tammy & Mike
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sgfrye

north carolina

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Posted: 05/13/19 06:21am Link  |  Quote  |  Print  |  Notify Moderator

wnjj wrote:

path1 wrote:

If tongue weight scale says 930 pds and then you hook up to to hitch ball and then load up wd spring bars...what happens? Where does that 930 pds go?

Practically speaking, some goes onto the tow vehicle front axle and some goes onto the trailer axle(s).

Technically speaking though, all of it stays there but the WD hitch creates an upward force at the ball which is countered by added downforce at the tow vehicle front and trailer axles. This lightens the effect of the trailer’s tongue weight on the rear of the vehicle.


good explanation

SoundGuy

S Ontario

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Posted: 05/13/19 06:29am Link  |  Quote  |  Print  |  Notify Moderator

path1 wrote:

If tongue weight scale says 930 pds and then you hook up to to hitch ball and then load up wd spring bars...what happens? Where does that 930 pds go?


Here you go - How Weight Distribution Works - 18 pages, when you have the time to wade through them all. [emoticon]

Lwiddis

Monterey, California

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Posted: 05/13/19 06:38am Link  |  Quote  |  Print  |  Notify Moderator

Bigger isn’t always better. If within a hitch limit...without WDH and with, you’re fine.


2015 Winnebago 2101DS TT & Tahoe LTZ, 300 watts WindyNation solar-parallel & MPPT, Trojan T-125s. TALL flagpole for US flag. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - old MOS 1542 & 1560.


GrandpaKip

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Posted: 05/13/19 06:55am Link  |  Quote  |  Print  |  Notify Moderator

It goes “poof” and disappears, according to the RV salesman who sold my kids their first camper.


Kip
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APT

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Posted: 05/13/19 07:12am Link  |  Quote  |  Print  |  Notify Moderator

Here is a typical example:

Dead TW: 1000 pounds

Drop tongue on ball:
TV Rear axle increases by 1400 pound
TV front axle decrease by 400 pound

Apply and adjust WD for 100% front axle restoration:
TV rear axles increased by 800 pounds from unhitched (decrease of 600 from no WD)
TV front axle same as unhitched
Trailer axles increased by 200 pound


A & A parents of DD 2005, DS1 2007, DS2 2009
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ppine

Northern Nevada

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Posted: 05/13/19 07:56am Link  |  Quote  |  Print  |  Notify Moderator

The WD applies upward leverage in the joint between your RV and the TV.

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