i have a fleet of "stingers" , each with a ball mounted on them .
the first i bought for my 2 inch receiver hitch for my first new car a 1972 suburban C20 with a big block 402 .
some stingers have a 2 inch rise and more have a 2 inch drop .
what i recall is that the various trailer balls can be purchased with a 1 inch diameter bolt , 3 /4" , or 1 /2".
the last ones i bought had the 1 inch bolt shank .
with a 2 inch riser type ball i would probably hold out for the 1 inch bolt shank .
or raise the stinger height itself .
i tow my 21T trailer slightly nose down.
i use a duramax with a 9200 gvw and my trailer is 900 # tongue weight and the trailer axles are about 5300 # , with a 7240# trailer axle gvw .
i do this because we boondock camp and i want more ground clearance at the back of the trailer .
we do ford some "vados" ( dips ) and this slight forward tip does not transfer too much weight to the front trailer axle.
we weigh our rig frequently because it is free at ODOT public scales after hours .