I just bought one of the 179 dollar specials, a "2 ton" (yeah, right), with four wheels. In fact, I have to run to town because I don't want to settle for the supposed grade 8 used to pin the leveler or chain, to finish assembly (a Walmart special, with zero directions, zero washers).
The ram says it's good for ten tons.
The farther back I slide the horizontal part, the more weight it's indicated to hold.
The EIGHT ton ram on a two ton picker makes sense, in a overkill way.
If you need photos or anything, just yell.