I don't think it always matters.
I keep toying with how we would do with a Arctic Fox 29-5k with our 2001 Ram.
This 5er has a GVWR of 16,600# all are going to say your crazy that is 2017 DRW territory!!
Well listed Dry weight is 11,200#, just about what our current 5er weighs. Then about 1,500# to 2,000# stuff and we are about 13,000#, doable for our tough little 2500, maybe, the concerning items is the Dry pin 2,663# (31%) Arctic is known for heavy pins.
PS: the extra 400# dry we would still be under rear stock GAWR!!
Arctic Fox 29-5K
Specifications:
Dry Axle Weight (approx. Lbs.): 8545
Dry Hitch Weight (approx. Lbs.): 2663
Net Carrying Capacity: 5392
Gross Dry Weight – Lbs.: 11208
Gross Vehicle Weight (GVWR) – Lbs.: 16600
Exterior Length (approx. w / hitch): 35’2?
It is numbers like this that make me say one needs to look at both listed DRY and GVWR. There are many surprises out there.
We looked at one of these last spring, and didn't think it was 35' long, didn't look that long. There are many 38' to 40' 5er with lower GVWR. Some of these have very low payloads, many under 2,000#, we easily get about 1,200# in our 32' 5er and the basement isn't huge. Now look at what happens when a family of five gets a 38' 5er with a 1,800# GVWR, I start to see an overloaded 5er!!!