Reply
 
Thread Tools Display Modes
Old 06-08-2014, 09:31 AM   #1
Senior Member
 
Mark S's Avatar
 
Join Date: Feb 2012
Posts: 237
Cargo to tongue weight relationship

I haven't been able to take my trailer and Harley to scales yet but was wondering how much weight does adding about 1,000 pounds to the cargo area take off the tongue. Is there a percentage, for example 20% of 1,000 lb. cargo weight reduces the 1,000 pound tongue weight to 800?

I realize that the length of trailer, location of wheels and cargo and lunar phase affect the number but is there a rule of thumb?
__________________

__________________
Mark and Joanne
2014 Fun Finder XT 276
2015 Ford F150 Lariat 3.5 Ecoboost 4X4 SCrew Max Tow
2011 Harley Road Glide Ultra
Mark S is offline   Reply With Quote
Old 06-16-2014, 11:04 AM   #2
Member
 
Join Date: Jan 2013
Posts: 39
I think every camper is going to be different.
I do not know a rule of thumb.
But from my experience you have to weigh the hitch at the ball yourself, do not believe what the manufacture tells you.

I have a Work & Play 275 ULSBS.
When I purchased it in the fall of 2013, the manufacture claimed a 1129 LB hitch weight. They didn’t say is this was dry or wet, but left the impression it was dry since all of the other weights were dry (or unloaded). I now think this is the lightest possible, (fully loaded garage). They also said ton towable, no way a ton truck can take the actual amount of hitch weight this thing has.
Since then the manufacture has changed and is now claiming a dry hitch weight of 1302 Lbs.
My camper with two batteries in front, both LP tanks filled and the normal amount of stuff in the camper (about 500 lbs. of gear) and I have a hitch weight of 1660 Lbs. This is measured with a Sherline hitch scale at the ball. My camper has some options like a generator mounted forward of the axels.
Anything added to the camper will affect the hitch weight. Most of my cabinet storage is forward of the axels.

Adding 230 Lbs. to the back of the TH and the hitch weight drops to 1560 LBS.
Adding another 650 LBS (ATV) to the back and the hitch weight drops to 1340 LBS.

I am assuming, fully loaded and my weight may drop to around the 1150 LB. mark or 10% of my 11,500 LB GVWR.
I hope this helps.
__________________

__________________
Geofish is offline   Reply With Quote
Old 06-16-2014, 11:49 AM   #3
Site Team
 
Kaadk's Avatar
 
Join Date: Apr 2013
Posts: 3,469
It's not an exact science, but you should be able to get your general rule of thumb based on ratio between 2 lengths.

First, measure length of midpoint of axles to tonque.

Second measure length of midpoint of axles to midpoint of cargo getting added to the garage.

The ratio between these should approximate the ratio of cargo to tongue.

So, as an example (not your true measurements) let's say axle to garage = 5 feet, and Axle to tongue = 20 feet. Ratio between these is 4:1. So, every 4 pounds in the garage should be about a 1 pound weight change in the tongue. A 1000 lb Harley would change the tongue by 250 lbs in this case.

Note that it's not really exact, as things like the suspension, flex in the frame, etc... will also factor in, but as a general rule of thumb, it should apply.

Disclaimer: All theories expressed here are from a basic knowledge of physics and not real world experience.
__________________
There's no use crying over spilt milk, unless it's on your keyboard.
Kaadk is offline   Reply With Quote
Old 06-16-2014, 12:08 PM   #4
Senior Member
 
Blackrock's Avatar
 
Join Date: Jul 2012
Location: SE Arizona's Gila Vally
Posts: 689
I don't know about all the math stuff but I do know that with my 1000# UTV in the bed of my 01' F150 7700 and a Micro Lite 25DS hooked up the front and rear axle weights are at max and total load is 12,500 lbs. I have my air bags on the truck at 80 psi and the wd hitch cinched up tight.

Tows real well but it's a grind in the mountains.
__________________
2016 RAM 1500 - 2016 Keystone Laredo 265SRK
The road goes on forever and the party never ends.
Blackrock is offline   Reply With Quote
Old 06-17-2014, 04:37 AM   #5
Senior Member
 
1l243's Avatar
 
Join Date: Feb 2011
Posts: 465
At this point I would not worry about the ratio. I would get the rig loaded and weighed. If your TW is between 10/15 percent of your trailer weight you are good.
__________________
1l243 is offline   Reply With Quote
Old 06-17-2014, 06:27 AM   #6
Senior Member
 
Oaklevel's Avatar
 
Join Date: Sep 2012
Location: Virginia
Posts: 3,535
The only way to know tongue & overall weight is to weigh it. Just moving the bike a few inches back or forward can change tongue weight some. The TH model make can be very different as to weights. Layout of axle location, type of axle mounting, number of axles, etc. Tanks (water, grey, black) being empty or full will change things. Too many variables to have a rule of thumb that is more than a (SWAG) guess .

Advertised tongue dry weight or total dry weight is that weight only once. When the trailer is totally empty. THs are tough as they can be loaded in so many ways with different toys.


__________________

2005 Dodge 3500 Cummins
2017 Wildwood Lodge 4092 BFL
1966 Mustang GT
1986 Mustang SVO
Sadie & Lillie Spoiled Rotten Boxers
Oaklevel is offline   Reply With Quote
Old 06-17-2014, 06:34 AM   #7
Senior Member
 
Join Date: Jul 2010
Location: Waynesville
Posts: 12,036
Quote:
Originally Posted by Oaklevel View Post
The only way to know tongue & overall weight is to weigh it. Just moving the bike a few inches back or forward can change tongue weight some. The TH model make can be very different as to weights. Layout of axle location, type of axle mounting, number of axles, etc. Tanks (water, grey, black) being empty or full will change things. Too many variables to have a rule of thumb that is more than a (SWAG) guess .

Advertised tongue dry weight or total dry weight is that weight only once. When the trailer is totally empty. THs are tough as they can be loaded in so many ways with different toys.


X2 Youroo!!
__________________
youroo is offline   Reply With Quote
Old 06-17-2014, 07:44 AM   #8
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
So here is a cool way to load your rig and fine tune the tongue weight.

The only "rule" I know of is (for safe handling) the tongue weight MUST fall between 9% and 14% of the total loaded camper weight.

Too light on the tongue, the trailer will want to swap ends during braking and sway will be horrible; too heavy and you will not be able to steer (without WD) and with WD you will most likely overload the front axle.

So, how to get the 12.5% of camper weight (ideal) you are looking for?

Use a bathroom scale, a 4x4 6 foot long, 2 short steel pipes, a concrete landscaping block the height of your scale, and a calculator.

By setting up the improvised tongue scale shown, you can move the bike around to see how it effects your ultimate load ratio.

If you use the 1 foot to the Paver and 3 feet to the scale, you would multiply the scale weight by 4. So if the scale reads 250 pounds your tongue weight is 1000 pounds.

You can also buy a tire scale. One Weigh Electronic Wheel Scale System - Speedway Motors, America's Oldest Speed Shop

http://www.speedwaymotors.com/Garage...Set,26410.html
Attached Thumbnails
Click image for larger version

Name:	tonguescale.gif
Views:	158
Size:	8.3 KB
ID:	55491  
__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Old 06-17-2014, 07:54 AM   #9
Senior Member
 
Join Date: Jul 2010
Location: Waynesville
Posts: 12,036
Herk,what happened to the (10-15%) T/W? Youroo!!
__________________
youroo is offline   Reply With Quote
Old 06-17-2014, 07:57 AM   #10
Site Team - Lou
 
Herk7769's Avatar
 
Join Date: Oct 2009
Location: South Eastern PA
Posts: 21,169
Quote:
Originally Posted by youroo View Post
Herk,what happened to the (10-15%) T/W? Youroo!!
The "rule" varies by web site.
They ALL seem to agree 12-13% is "optimum," so that is what I use (12.5%).
__________________

__________________

Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW
Herk7769 is offline   Reply With Quote
Reply

Tags
weight

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 08:29 PM.