Trolley wheel
thingiverse
A 10mm thick, 70mm dia meter solid(ish) wheel with a seat for a 608 bearing. Medium duty - would easily take the weight of a person if you had four on a trolley of some kind. Key dimensions are parameterised so you could tweak it if you want to. Instructions I recommend 0.3mm layers or lower, and apply a cooling fan to the part as it is being printed to prevent the edges curling.
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