What you are measuring is not what Ford is advertising. The 2016 specs say the load floor height on a F350 SRW 4X4 is 37.7 inches off the ground. The DRW 4X4 is 35.6 inches…2.1 inches shorter. The 2017 info says the SRW is 37.9 inches and the DRW is 36.9 inches. There is only a 1 inch difference between the 2017 SRW & DRW. The 2017 DRW sits 1.3 inches higher than the 2016 according to Ford's literature. I can't imagine there being a 5 inch difference between a 16 and 17. 1.3 inches seems more like it with a more compliant suspension making up the difference. My 2016 DRW measures exactly as Ford says at 35.5 inches. I looked at the 17's before buying the 16 and did not see a big difference. I was trying to stay away from a DRW truck, but the GVW on the trucks stayed the same. The SRW is still at 11,500 lbs which makes hooking up a large 5th wheel or toy hauler a problem for me. The tow rating and combined went up significantly, but the GVW did not go up at all The truck lost about 250-300 lbs after beefing up drivetrain and going to aluminum. I like the new 28K combined, but don't know how you get close to that without busting out of the GVW in a single rear wheel truck. I had to trade my SRW for a DRW to keep under the GVW and Combined. My 2016 SRW KR 4X4 Longbed hit the scales at 8110 with the hitch in it and a full tank of diesel. By the time 2 people climb aboard (400 lbs) , a couple of pups and some gear the weight goes to 8700 lbs. That leaves 2800lbs of king pin weight…. likely 3100 in a 2017. Not enough for my fiver or any triple axle toy hauler I know of. Make sure you order enough truck. A SRW will have a hard time staying under it's GVW with a triple axle toy hauler hooked to it.