Written specifications say the 1890 HD runs from 9,980 lbs to 11,500 lbs depending on options. I've never had it on a scale, but somehow think I remember a paper that said it was 10,500.Yeah, 10,500. Crazy you couldn't find a way to shake off 501 pounds. I'm sure there is some extra steel you could do with out.
The 250 hp engine is the largest horsepower engine ever available in that model. 250hp John Deere or Cat was offered for the highest hp.
None of my co-workers have had a CDL and no officer has ever thought of it needing a class A CDL to pull it. It could happen though if an anal enough one came across it.
I'm the only one with a CDL and I normally am not the driver of the 550.