CURT 45790 Receiver Tube Adapter (1-1/4 to 2 Shank, Not for Towing Use, 6-
1-1/4" to 2" Aluminum Hitch Adapter – Hollywood Racks
Buyers Products 2-in to 1-1/4-in Hitch Adapter with Corrosion-Resistant Zinc Plating - Easy Conversion, Durable Steel Construction in the Trailer Hitch Receivers department at Lowes.com