Thats what I thought 4th, 35 gallons fuel was in the trailer, it has a 5.5 onan gen mounted 8n the tongue. Good to know on 17k and I doubt she will see 217 with this load. Its as heavy as we will ever push it.That's 4th gear.
Short bed trucks only have a 31 gallon tank.
She's just starting to break a sweat at 17K GCW. 210° isn't a big deal and she'll push 217° in hotter weather or with a bigger load.