Interesting question. Seems simple enough, but .....
Go to the Blue Ox site - http://blueox.com/trailer-towing/swaypro/
The balls listed are
P# BX88213 2-5/16 x 1-1/4 x 2-1/4 x 1 ris (assume this is rise)
P# BX88214 2-5/16 x 1-1/4 x 2-1/4 x 2 ris (assume this is rise)
P# BX88234 2-5/16 x 1-1/4 x 2-1/4 x 1 ris 25K (Assume this is a 25,000 lb capacity
Interesting from several issues.
Do 2-5/15 balls come with a different size shank than 1-1/4 x 2-1/4?
What is the capacity of the standard BO Ball? Have to check that.
What rise did the dealer install on the BOSP for us? (edit - std-0 rise)
Will an alternate rise help us level the trailer? At least it's an alternative to check.
Really like the idea of a 25K ball - talk about belt and suspenders. Wow!
Every day is a learning experience. Travel safe.