Look around your "home improvement" store, sometimes you can find foundation
"J" bolts or similar things for a 1/10 th the cost of round steel bar.

terry

"Karl Townsend" remove .NOT wrote in
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I am always needing to put tires on some items that I use such as large
fans, homemade generator/s, carts, etc. I have used drill-rod once in
an
emergency. Other times, all-threaded rod but I know there is other
material that has to be cheaper.

For some larger items to be wheeled, you can't beat the entire rear axle
with tires and wheels from a small front wheel drive car. Available at any
junk yard.

Karl