Originally Posted by mikemc53
A Rockwood Ultra-Lite with the following manufacturer noted specs:
Dry Hitch Weight = 1,324 lbs. (601 kg)
Unloaded Vehicle Weight = 7,944 lbs. (3,603 kg)
GVWR = TBA
Cargo Carrying Capacity =1,406 lbs. (638 kg)
First am I to assume that (for analysis sake) adding the cargo capacity to the unloaded vehicle weight will give me the GVWR or is that the GCWR?
GVWR = about 9,268 or close to that. Trailers don't have GCWR.
Dry hitch weight is a useless number, so as Jim suggested, use 20% of the gross weight of the trailer.
Also, if this were our choice and we don't currently own a TV, would looking at used 3/4 ton diesels (3-4 years old) SRW, be an OK starting point?
No. Assuming you don't want to exceed any weight limits, then you'll be limited to hauling almost nothing in the tow vehicle (TV) without exceeding the GVWR of the TV.
So go for an F-350 SRW or a GM or Ram 3500 SRW to tow a 9,000 pound 5er without exceeding the GVWR of the TV.
Example: 2005 thru 2010 F-250 has GVWR of 10,000 pounds.
20% of the GVWR of the 5er is an estimated pin weight (weight on the kingpin, also called hitch weight) of 1,966 pounds.
10,000 GVWR minus 1,966 pin weight = 8,034 pounds left for the max weight of your wet and loaded TV. But if your TV is a CrewCab diesel 4x4, then it's going to weigh more than 8,034 with nothing in it but a skinny driver and skinny passenger. OVERLOADED!
So ignore the three-quarter ton TVs unless you can settle for a 4x2 with a gasoline engine.
Go for a minimum of an F-350 SRW, or 3500 SRW from GM or Ram. GVWR of the F-350 = 11,500 pounds, and wet and loaded weight of the TV increases only a few pounds. So instead of 8,034 pounds max weight of the TV, you have 9,500. Now you have breathing room. Normally loaded CrewCab diesel 4x4 will gross up to 9,000 pounds including tools, jacks, pets, etc., leaving you with about 500 pounds to play with for hauling additional tools, jacks, fuel in an auxiliary fuel tank, etc.