The one that it's showing doesn't seem to tell me what size mount it has, but the balls listed below say 3/4". Would that be the size that I'd need to get for a rack, because I haven't seen any online for anything smaller than 1-1/4"?

http://www.etrailer.com/productdetai...rfrom=1989&h=e

edit: You guys answered the question before I even asked it.