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Old 02-19-2014, 12:55 PM   #1
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Gvrw, gcwr, uvw, ncc....what can i tow?

I just purchased a full set of six Toyo M154 245/75R22.5 L speed rated tires with a single/dual load rating of 4675 / 4300 at 110 psi.

I calculate that my tires can carry a max of 26,550 lbs at 110 psi.

Say that I'm right at my GCWR at the max of 24,850 lbs. with people and cargo in the coach.

How much can I flat tow using the rear hitch. The coach is supposed to be rated at 5,000 lbs.

Also, what would be my max tongue weight for a class III hitch, based on my current GCWR for a vacation trip, if I were to tow a TT.



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Old 02-19-2014, 01:11 PM   #2
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Hi Bad Bolt,
For the example in your post, take the GCWR - GVWR and that is the weight you can tow. Looking at the label, that is 4K lbs. This is what the coach should be rated at.

The maximum tongue weight will be on a sticker on the receiver/hitch.

What the coach can tow and what the receiver/hitch can handle may not be the same.
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Old 02-19-2014, 01:23 PM   #3
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There might also be another spec. In my owner's manual, it also states that the max. weight trailer without brakes is 1000 lbs. So, you might need to install a brake assist unit to avoid going over the braking capacity of the MH.
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Old 02-19-2014, 02:01 PM   #4
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I have a 4650 lb. dry trailer with dual axle dual electric brakes. Tongue weight is under class III max, pretty sure.
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Old 02-19-2014, 02:27 PM   #5
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Quote:
Originally Posted by Bad Bolt View Post
I have a 4650 lb. dry trailer with dual axle dual electric brakes. Tongue weight is under class III max, pretty sure.
The actual tongue weight is determined by the way you load the trailer. If the trailer is properly built the manufacturer will have 10%-15% of the empty weight of the trailer as tongue weight.

I have a dual axle trailer that weighs 2,100 lbs. empty. 250 Lbs. of that weight is on the tongue to keep it stable when towing empty. The trailer can handle up to 10,400 lbs. when fully loaded so if the load is balanced there would be 1,040 lbs. of weight on the tongue.

The same formula applies to any properly built trailer. In your case the fully loaded trailer (4,650 lbs.) should place at least 465 lbs. of weight on the tongue. The key is to estimate the weight of each item you're intending to load into it and arrange the load so it places the proper load on the tongue.

There are scales available to accurately check the tongue weight. However they are expensive if it's a one time thing. Here's a link to an article on the e trailer website showing several ways to measure tongue weight.

Determining Trailer Tongue Weight | etrailer.com
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Old 02-19-2014, 05:20 PM   #6
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You need to have the MH weighed. The GCWR - the MH actual weight is the amount you could safely tow if the receiver can handle the actual weight, in you case 4650 lb + the loaded weight. My guess is the 4650 trailer will be to heavy when loaded. JM2Ę...
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Old 02-19-2014, 07:50 PM   #7
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Don't forget that the trailer tongue weight adds to the GVW of the MH. If you are at max GVWR without a trailer attached, you can't tow a trailer. Your MH will be over weight with the trailer attached.

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Old 02-19-2014, 09:52 PM   #8
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It seems to me that if you want to tow anything approaching 5k lbs with an Endeavor, you're going to have to run light on CCC.

I guess all those nice cargo bays are kind of useless in some circumstances.
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Old 02-20-2014, 08:57 AM   #9
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This has been posted before...here it is again...

Do the numbers, the tow rating is the lower of:

1. GCWR minus tow vehicle's actual weight.

2. Hitch capacity.

3. Coach tow rating.

4. Chassis maker's tow rating.
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Old 02-20-2014, 06:03 PM   #10
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Quote:
Originally Posted by Bad Bolt View Post
It seems to me that if you want to tow anything approaching 5k lbs with an Endeavor, you're going to have to run light on CCC.

I guess all those nice cargo bays are kind of useless in some circumstances.
Hi Bad Bolt,

To address the above comment, I think your MH was not meant to tow a large trailer, but only a toad which would have negligible tongue weight.

It took me a while to sort out what I think you are attempting to do based on your previous posts. I don't think you gave us all the info in this thread for us to make an informed decision. Here's what I think your equipment is and what you want to do:


1) '99 HR Endeavor with factory rated GVWR of 24,850 and GCWR of 28,850. It left the factory weighing about 21,000 without any dealer installed options. (I would doubt this number as they were optimistic in those days.)

2) You've made several changes to your MH, which may have increased its weight: Handicap lift, larger tires, couch?, others? You really need to load up your MH, ready for travel, and have it weighed to see if you are overweight and how much you can tow.

3) It seems you put on larger than stock tires to increase your load capacity. You can't (legally) increase GVWR by adding larger tires. I'm guessing your ultimate weight limit is your transmission's capability, hence the 28,850 GCWR.

4) You are planning a several weeks adventure from Ohio to Ft. Wilderness this winter with your sister and mother, others?. You will unwinterize in FL. Will you have water in your tank for your return trip (added weight)?

5) You want to tow a Forest River Grey Wolf Toy Hauler (at least 25' long) with a dry weight of 4,650 with a potential GVWR of nearly 8,000 and an estimated maximum tongue weight of 800 to 1,000 lbs. (This much tongue weight may require a weight distributing hitch which may or may not be allowed by the MH manufacturer.) You need to load up this trailer, ready for travel, and see how much it weighs and also determine the tongue weight. Hook this loaded trailer up to the MH and get the whole thing reweighed. (I'm guessing the rear axle of the MH will be overloaded. The trailer tongue weight will get amplified because of its distance to the rear axle.)

6) You stated you have a class III hitch. What is it rating? Iím guessing it is 3,500 or 5,000 tow and 350 or 500 tongue weight. Is there a load sticker on it to confirm?

7) Unfortunately, you have a marginal MH for towing anything large. As stated previously, get your loaded, ready for travel MH weighed and take this GVW and subtract it from the GCWR of 28,850. This is the amount you can tow up to the hitch rating (probably 5,000 max).

I hope this helps and doesnít discourage you from RVing.

Fran
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