In OR the truck weigh stations are always on for public use.
My 2019 44r weighs in at 41,240. I had a 1/2 tank of fuel and about 75 gallons of fresh...but of course the black and gray had those other 25 gallons.
Not sure if this helps, just giving you an Idea of what a Spartan K2 chassis weight would be.
2019 Entegra, Aspire 44r. Former coach 2010 Fleetwood Discovery, Cummins ISB 350, 2016 Jeep Rubicon or 2005 Jeep Rubicon.