12 inch slicks on a 10 inch rims?

anyone ever run a bias ply 12 inch on a 10 inch wheel?

currently have a set of 10 inch pro-stars with 10.5 slicks mounted. wondering if I'd be nuts to run a 12 inch tire on the same?

thanks in advance!
It is physically impossible to run a 12 inch tire (really, any tire) on the same rim as you have a 10.5 inch tire o