I can never reember which was roubnd it is. Is it deffo be in the arches idrees? Or stick out...
Eitherway its not far off what you need, most run about ET40, so it shouldnt casue much problems.
As for the centre bore, its not 52, its 54mm, you will need to get spigot rings to fit this, unless you are lucky and they were previously fitted to a toyota or mazda and have the spigot rings with them. (unless thet are new of course)