Quote:
Originally Posted by Hitchpin
I know what the numbers mean but what I don’t understand is how you can have a GVWR of 3,200 lbs. when you only have a GAWR of 2,720 lbs.
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As Rusty said, the difference is hitch weight.
However, GVWR of the trailer doesn't mean much when on the road. When you weigh the rig on a CAT scale, you'll get 4 weights, and none of the 4 weights will give you what you need to determine gross trailer weight:
Front axle of the tow vehicle (TV).
Drive axle of the TV
Trailer axles
Gross combined weight
Compare the weight on the trailer axles to the trailer's GAWR. The scale won't give you the total weight of the trailer (GVW) unless you do some re-weighing and computations. But the GVWR is not important, while the GAWR is very important. Exceeding the GAWR of the trailer can (and probably will) result in tire trouble and maybe other problems such as broken springs.
Even if you don't exceed the GAWR of the trailer, you can still have tire problems. The RV and other trailer manufacturers install trailer tires that will barely carry the weight of the trailer when loaded to the GAWR, even when you pump up the trailer tires to the max PSI on the tire sidewall. No fudge factor. The result is frequent blow outs and other tire problems. Been there, done that. So my three highway tag trailers as well as my 5er RV trailer all have oversized tires with significantly higher load carrrying capacity than the stock tires.
For example, my 3 tag trailers as well as my 5er RV trailer all came with ST205/75R15C tires on 5.5" wide rims. I replaced them all with 225/75R15E tires on 6" wide rims. I got home yesterday from a 2,000-mile round trip dragging the 7x14 enclosed cargo trailer at 65 to 70 MPH, without a hint of trailer tire problems. Experience tells me I would have had at least one blowout and probably two if I tried that trip at that speed and load with the stock-size trailer tires.
Compare the gross combined weight (GCW) of the TV+trailer to the GCWR of the TV. If your gross weight is more than the GCWR of the tow vehicle, the TV will have to work very hard to climb hills and mountain passes, and you'll be the slow-poke holding up traffic.
Add the two TV axle weights and compare the total to the GVWR of the TV. Never exceed the GVWR of the TV.