BFL13 wrote:
You are assuming that the spec dry weights are correct. Usually that does not include "options" you might have that weigh something, that you thought were included in that dry weight.
Options might include fibreglass sides instead of aluminum (add 500 lbs) double pane instead of single pane windows, winter grade insulation package, air conditioner, whatever.
Note your spec dry pin weight percentage is 20% (2700/13400) but your measured 3220/17500 is 18%. At GVWR 16500 and 20%, pin would be 3300. No effect on overall weights, but you might be loaded to the rear of the axles, or else nose high when hitched. You can adjust the hitch and king pin heights to get level if need be.
This says the 13,400 UVW "is based on average weight" whatever that really means
https://www.granddesignrv.com/showroom/2019/toy-hauler/momentum/floorplans/354m
Good call on the pin weights. I'm going to lower it a pin.
I'm pretty sure Grand Design weighs them when they come off the assembly line. I'll call them Monday to be sure. I say that because on the sticker by the propane tanks they list the precise weight. I didn't write it down, but it was an exact number to the pound, and it was slightly less than 13,400.
If they did weigh it, then I'm guessing it was weighed with the options that the dealer ordered it with. I'll call them Monday to be sure. Either way, I went through the list of optional equipment on our RV and the only thing that weighed more than a few pounds was the generator. I'm sure that's a few hundred pounds, but still not enough to explain the discrepancy that I'm seeing.
I'll give Grand Design a call on Monday to try to find out if they weighed it, and, if so, if it included the dealer options. I'm also going to empty the tanks and take it across the scales and see what I get.
Thanks for the advice, folks. It sounds like I'm going across the scales correctly...I just need to figure out why I'm 900 pounds heavier than I should be. Hopefully Grand Design can help me figure out the base weight of the rig and then I can go from there.
P.S. - I'm not over the tire rating, and I can get below the axle rating by dumping a little water. However, I am very concerned about the total weight.
