Amazon has 4" Square RV Bumper Bike Rack Lite Cargo Hitch Receiver Adapter at $14.99 (Original Price: $29.99) After using Coupon Code: KITTYSDD (50% Off) at checkout and Shipping also Free.
- One-piece Iron Casting Hitch Receiver Adapter
- Black powder coated iron with zinc plated hardware
- Also fits Bumpers 4.5" Tall x 4.25" deep
- Size/Dimensions: For 4" square continuous welded RV bumpers (can also work with bumpers 4.5" tall x 4.25" deep), accepts a 2" tube.