MTVR towing capacities

dlynes said:

I wonder what DOT would go by? I believe the tires are rated at 14,540 each or combined weight of 87,240 lbs.

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DOT would likely start with their standard bridge formula. IIRC Fed max is 20k front, 34k total for rear tandems, so assume 54k MAX for your truck alone. Most states have variances/limits for certain instances including tire or wheel width, so you may be limited to less on your single tires.

Jbulach said:

DOT would likely start with their standard bridge formula. IIRC Fed max is 20k front, 34k total for rear tandems, so assume 54k MAX for your truck alone. Most states have variances/limits for certain instances including tire or wheel width, so you may be limited to less on your single tires.

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Funny thing is the rear tandems are only 3.6 inches away from being a 5ft spread which from my understanding increases the max weight allowable on those axles by a considerable amount.

Been years since I’ve dealt with this stuff but thats probably a state or overweight permit thing. Used to work building heavy haul trailers back in the day, IIRC they were almost all 60”, but they were permit loads, empty, no matter how far you broke them down. We did build some small step deck trailers with huge spacing 10-12’? that I believe got you some more weight somewhere…

DeMilitarized said:

Legally your openly allowed to tow 22k by dot standards and anything more is a citation. If you don’t already have your class a or e in Georgia you’re also violating the law.


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I am going to get my non CDL, Class E but unless the trucks legally rated higher than 22,000 lbs, I will keep towing with my 1 ton though.

Jbulach said:

DOT would likely start with their standard bridge formula. IIRC Fed max is 20k front, 34k total for rear tandems, so assume 54k MAX for your truck alone. Most states have variances/limits for certain instances including tire or wheel width, so you may be limited to less on your single tires.

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that would align more to this:

GVWR is 62,200 - 28,000 (VCW) = 34,200 + 22,000 (trailer) = 56,200 lbs

I spoke with an Oshkosh Defense, Product Training Center's Technical Support Specialist today and he told me the military derated the trucks and the GVWR is all they requested. I asked if they would re-rate it to their true rated capacities and ofcourse they said they would not and the military would have to request that. I told him I now own it for my personal & private use.

dlynes said:

I spoke with an Oshkosh Defense, Product Training Center's Technical Support Specialist today and he told me the military derated the trucks and the GVWR is all they requested. I asked if they would re-rate it to their true rated capacities and ofcourse they said they would not and the military would have to request that. I told him I now own it for my personal & private use.

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What was the original rating?

DeMilitarized said:

What was the original rating?

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He would only share their disclosed and published GVWR of 62,200. He wouldn’t share what Oshkosh rates it for based on how it’s built.

dlynes said:

He would only share their disclosed and published GVWR of 62,200. He wouldn’t share what Oshkosh rates it for based on how it’s built.

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Tires are good for 85k so we could go with that.


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dlynes said:

He would only share their disclosed and published GVWR of 62,200. He wouldn’t share what Oshkosh rates it for based on how it’s built.

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Call back and mention it’s for the pierce hawk extreme, same platform as the MTVR but fire fighter setup non military


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dlynes said:

that would align more to this:

GVWR is 62,200 - 28,000 (VCW) = 34,200 + 22,000 (trailer) = 56,200 lbs

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Thats not how GVCW is figured. Also DOT will not care how much more your trucks manufactures GVWR or the tires rating are over their bridge laws, or permitted limits.

Also where are you guys coming up with 22k trailer weight? Is that on your data plate?

DeMilitarized said:

Tires are good for 85k so we could go with that.


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I’m sure I’ll get many different answers but I’ll stop at a weight station and talk with DOT. The listed max trailer weight of 22,000 may be the show stopper.

After you tell them what your GAWR and tire ratings are, make sure you have all your axle spacings, wheel dimension’s, and tire specs/measurements on hand, including the specs and ratings of your trailer you hope to tow. My WAG, from what I remember, depending on the trucks front GAWR, or wheel/tire width restrictions, is that you should be good for 80k GCVW interstate.

Don’t “TELL” them it’s a FMV, or that it’s “only rated to pull a 22k trailer”, wherever that is coming from, unless it’s stamped on your data plate? IIRCC the TM’s are still classified so if thats where the numbers coming from, “YOU don’t know”…

For reference the old 5 ton cargo trucks data plate called for a max tow weight of 30k on hwy. This should give us an idea of how ridiculous a 22k limit on an MTV is. Maybe 22k offroad and double that for on road would sound about right, and then give you more capacity than DOT would likely allow.

Maybe some of the lawyer or engineers types on here can try to translate the codes application to an MTVR before you stop at the scale to help narrow down your questions.

Do you have this data plate on your truck?
If so, and I’m reading the blurry text correctly, you should have all the verbage you need to be able argue any legal weight trailer combination, just as long as it does not put you over any of the trucks rated axle ratings as stated on the plate.

Jbulach said:

Do you have this data plate on your truck?View attachment 940703
If so, and I’m reading the blurry text correctly, you should have all the verbage you need to be able argue any legal weight trailer combination, just as long as it does not put you over any of the trucks rated axle ratings as stated on the plate.View attachment 940704

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I have seen those plates before. Thanks for sharing them. The military requested for them to be 'derated' when they accepted the posted trailer rating of 22,000 lbs. Unless I am interpreting their data wrong. They list max cargo of 30,000 lbs and max trailer of 22,000.

Does that mean combined loaded trailer cannot exceed 22,000 lbs OR does it mean the maximum weight of a trailer cannot exceed 22,000 lbs and it's loaded cargo cannot exceed 30,000 lbs. but then that would eat into your payload weight.

What I do not know is the GCWR.

I weighted my truck and it weighted 28,000 lbs. -GVWR 62,000 = 34,200 additional weight the truck can legally carry on its own axles

MK25 Truck, Cargo, 7-Ton, W/Winch
GVWR 62,200 lbs

Actual Vehicle Curb Weight (VCW) 28,000 lbs
GCWR ?

if GVWR is 62,200 - 28,000 (VCW) = 34,200 + 22,000 (trailer) = 56,200 ???

GAWR 65,000 lbs
FRONT 16,000
MIDDLE 23,500
REAR 25,500
Max Cargo 30,000 lbs
Max Trailer 22,000 lbs