Yes, it is a class 1 hitch, and I found a 250lb weight limit in a 2012 brochure.
Based on my observation of the frame underneath, which was nothing (means 'I can't see it without taking it apart'), and the lack of consistent data from Dynamax, I'm going to restrict my use to 225lbs (max minus 10%).
It probably could handle more, but in reality, it's all I need. Bikes and maybe some stuff I don't want inside the rig.
Here's the pdf I'm referencing: http://media.rvusa.com/library/trilogy.pdf