No, the Kimtab magnesium wheels are the original cast wheels - the first ever available aftermarket ones. But since they were made in the early 70's, they're CB750 size, i.e., WM2 front (2.15) and WM3 rear (2.5) which was considered "big" back then. I'm thinking 110/90 front and 110/80 rear. Or perhaps get real wild and go for a 120/90 rear, wow!