I'm attempting to find a pair of plain simple plastic cart wheels. 22cm outer diameter, 1cm axle diameter. I can't seem to find them either at Lowes or on eBay. Help locate a source I can order from?

https://www.bunnings.com.au/move-it-100mm-white-plastic-centre-wheel-rubber-tyre_p3942885

8 and 10 inch wheels from Grainger

More wheels at Grainger

Harbor Freight? Especially if you don't need an exact match, and can replace the casters. 22cm is pretty big though.

https://www.harborfreight.com/10-inch-x-1-3-4-quarter-inch-rubber-wheel-90051.html

https://www.harborfreight.com/8-in-cushioned-rubber-swivel-caster-69900.html

Yeah, they don't have to be an exact match, as long as the axle hole is 1cm.

I'll definitely check Harbor Freight soon, with old part in hand..

Try McMaster-Carr. They have everything and everything has all dimensions labeled and filterable

https://www.mcmaster.com/products/wheels/wheels-1~/

Meh, we just went ahead and got a pair of 8" hard rubber tires from Harbor Freight. It would have been nice if they had the original ~8.5" size we wanted, as we only needed one tire.

I thought about upgrading to 10" tires to help make it somewhat easier to roll up and down stairs, but hell if these new tires ain't already heavy enough..