I have used all of these balls. Just recently when I bought a dump truck with a 2 5/16" hitch, Guy mentioned that I have a 2" ball. I took it off and added 2 5/16. I would have to pay for a new ball and the guy who installed it. SAVE UP! Another time was when several goats ran away from me. I had to borrow a small trailer with a 1 7/8 hitch. about s. moment if i didn't have Convert-A-Ball.