Mine is a 2.5" and came with a stupid adapter. t was a pita finding a locking pin that was long enough. Everything feels loose and makes a lot of racket. Oh well it works though.
Even My Cushion Hitch is ovaled out and now bent. It is onl a Class IV hitch i believe but the 4" of travel take the jolt out of it so you wouldnt expect it to oval out as easy.
For some reason i pulled with it this year and now the tube is bent.