As you all know, we bought this rig a week and a half ago, it came with Goodyear 245/70R19.5 tires and they were manufactured in June of 2004. Since I wasn't sure of the loading, I have been using 90 PSI Fronts and 85 PSI Rears. Workhorse & Fleetwood list 95 PSI Max. Fronts and 90 PSI Max. Rears.
I finally got all our gear loaded where we wanted it, and with a full tank of fuel and water, got it weighed at one of my customer's scales locally.
Actual results were:
<UL TYPE=SQUARE><LI>Front Axle - 7400 LB (Fleetwood Max. 8000 LB)
<LI>Rear Axle - 13360 LB (Fleetwood Max. 14500 LB)
<LI>Total - 20760 LB (Fleetwood Max. 22000 LB)[/list]My Jeep Grand Cherokee toad was weighed as well, and came in at 4300 LB, so my total GCWR is 25060 LB, and Fleetwood lists for this model/year a maximum of 26000 LB GCWR (Gross Combined Weight Rating - The Mfr. maximum allowable loaded weight of this motorhome and towed vehicle).
I decided to use a fudge factor/buffer of 5% just to be safe on the high side, and we all know our weights change constantly just by driving the rig and expending fuel anyway.
Fronts 7400 LB/2 Tires X 1.05 Buffer = 3885 LB/Tire
Rears 13360 LB/4 Tires X 1.05 Buffer = 3507 LB/Tire
Per the Goodyear RV Load/Inflation Information PDF File
Front Tire - 3890 LB should use 80 PSI (my actual was 3885 LB)
Rear Tire - 3515 LB should use 75 PSI (my actual was 3507 LB)
End Result - I can actually LOWER my tire pressures 10 PSI per tire for a smoother, quieter ride, and hopefully even better tire wear.
Hope this helps you decide to get your RV weighed and properly tuned.