The outside diameter of the receiver portion for the Hitch Extender for Brophy Hitch-Mounted Stairs # RHSE is about 2-1/2" while the shank portion (that fits in your vehicle's hitch receiver) is about 2". Please note that this was designed to be used with the Brophy Hitch Stairs # RHS2 and hasn't been tested or approved as the base of a bike rack.
If you let me know what bike rack you have I can see if we have a replacement part for it. view full answer...
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