When I bought my ‘07 x210, I hauled it home. (Only a couple of miles) using the hitch that I had with a 2” ball. I later noticed that just behind the coupler, the requirement for a 2 5/16” is stamped into the metal plate!
My advice is to look closely in the area just behind the coupler for the required ball size. You may have to brush away some accumulated road grime to see the stamped info but it should be there!
If you're not livin' on the edge, you're takin' up too much space!
2007 Shadow Cruiser x210, 2004 RAM 2500 4x4 QuadCab SLT 5.9L CTD, Factory Tow Pkg (3.73 axle), HaulMaster WDH