Yuh, Mazda have a 60mm bore, SXs have a 66mm bore but being aftermarket wheels I would guess they use spigot rings to adjust the size. Only way to find out about these wheels is to get a ruler out.
Yeah i guess most aftermarket alloys would cater for this anyway, making the centre bore larger then ofcourse you can always size it down to the correct size with spiggot rings ?!