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I don't know a thing about Dovos but then there is 2 wheel dia. for double hollow (if they have 1). Good luck figuring that one out. I would guess for those it would be a 5" or 6 " first with a 4" on...

Looks like no one ever measured. And maybe there are more than 1 ?
If you want to know what yours is grab a compass and draw some lines till they match the grind. Measure the radius and double. And...