The only cargo carrier Aiken sells that fits the smaller 1 1/4" hitch size.  This cargo carrier also comes with an adapter to fit 2" receiver tubes as well.  The cargo carrier also has a raised shank to allow for additional ground clearance under the carrier, has mounting holes along the sides for tie down straps, cargo bags or bungee chords.
 
48"x20"
300 lb capacity
Weighs 28 lbs