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@daveray
I could be wrong but as far as I knew 622cm is the bead size of 700c wheel(and tire). Of course the c doesn't stand for cm that would be way too easy. So so long as you have taken that size from a tire, you have yourself a 700c wheel. Obviously the wheel from edge to edge is going to be a bit more like 630ish cm to allow for the bead to clinch to the rim, but I suspect you're all good. I think the bead size is called the Erco(?) if you want to check it. Good luck.