My version of a hitch carrier that also functions as a utility cart. The primary purpose was to have a cart I could take on beach or fishing trips that wouldn't take up additional travel space & would actually roll in the sand. The polyurethane balloon wheels seemed gimmicky & weren't cheap but made a huge difference in the sand compared to traditional plastic or pneumatic rubber wheels which made pulling a cart feel like you were dragging a rock across the sand.
I cut out the axle crossmember from my 800lb capacity gorilla cart & attached it with u-bolts to the hitch carrier. This allowed me to retrofit the swivel axle assembly & handle from the gorilla cart. Since the axle bore size on the poly & rubber wheels were different, I made removable axles using threaded galvanized pipe & iron floor flanges to be able to use either wheel. I considered using my larger steel hitch carrier for this project to allow for more travel space but decided to use my smaller aluminum HF carrier to make it lighter to pull in the sand. It was nice to be able to unhook the hitch carrier & immediately roll it to where I needed to unload it. The poly wheels I went with are 12" in diameter & 2 wheels are rated for 240#. I also made removable fishing rod holders so they wouldn't get in the way when strapping things down for travel.
Parts:
Aluminum HF hitch carrier
1/2" id x 8" threaded galvanized steel pipe (qty 4)
1/2" id threaded galvanized iron floor flange (qty 8)
3/4" galvanized iron floor flange (qty 4)
12" poly balloon wheels (qty 4)
4 cotter or hitch pins
Aluminum mesh
*Parts taken/cut from 800lb capacity gorilla cart: front & rear axle assemblies,, swivel handle