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mackyb's avatar
mackyb
Explorer
Jul 27, 2014

GTWR & GVWR???

I am trying to use one of the online RV weight calculators. I have gone to the scales & have truck + trailer weights, axle weights, truck only axle weights & truck only total weights. Where I am stumped is how to determine the 5th wheel GTWR & GVWR to input on the calculator. Can anyone let me know where or how I get these 2 weights?

25 Replies

  • Well, you're showing 11,200 lbs. on your truck which has a GVWR of 10,000 lbs., so you're over your truck GVWR by 1200 lbs. And that will go up a bit more when you add the 1200 lbs. of cargo, unless it's all rear of the axle in which case the pin weight might go done some. You're over your rear axle certification rating by a couple hundred pounds, which will also go up some when the trailer is fully loaded unless as noted.

    You're pulling a 5th wheel that weighs about 13,000 lbs. and you're going to add about 1200 lbs. to that. Your GCW will be around 23,000 lbs. so you're under your GCWR.

    What tire size/rating are you using? Isn't the Denali an SUV? We are talking about a 5th wheel trailer here aren't we?
  • Maybe I should give my scaled weights & let some of the experts help me out. I am towing a 2015 Spartan 1032 toy hauler with a 2013 GMC Denali HD Duramax/Allison, 4WD, 3.73, air bags & Trail Air pin box. Tow rating 14,700# according to GMC.

    Scaled Weights of truck & trailer combined: 21,920# gross weight, steer axle = 4800#, drive axle = 6400#, trailer axle = 10,720#. Weight of trailer did not include all normal camping items but did have approximately 12 gallons of gas & 10 gallons of water on board plus around 150# of extra things we normally leave in trailer when not in use. The only extra weight I would be carrying would be my wife (115#) & 3 dogs (135#).

    Scaled weights of truck only: 4,740# steer axle, 3560# drive axle, 8300# gross weight.

    Certification Ratings: steer axle = 5200#, drive axle = 6200#, GVWR = 10,000#, GCWR = 24,500#

    Can I have some feedback on my set up. I will be adding approximately another 1,200# of cargo in the trailer (4 wheeler, clothes, food, adult beverages). I know I am either pushing the limits of my 3/4 ton truck or going over the limits. I know most will say I am in 1 ton dually territory most likely but that is not an option. My truck with the Duramax, air bags & Trail Air pin box tows just fine but I wanted to get some feedback from others on my setup.
  • What you really need is the GAWR (Gross Axle Weight Rating) for the axles on the truck and the trailer. The important reason to get scale weights is to avoid overloading the axles or tires.
  • fj12ryder wrote:
    The GVWR should be listed on the manufacturer's tag on the trailer. I don't know what GTWR stands for.


    Guessing - Gross Trailer Weight Rating? That would be listed on the 5er as well. GVWR might refer to the TV. These are ratings-not actual weights.
  • The GVWR should be listed on the manufacturer's tag on the trailer. I don't know what GTWR stands for.

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