what size of tyres for 17" alloys on e36 3281 coupe?

[scoobyc]

I've been been offered a set of "as new" alloys with no tyres from a 1 series that seem an ideal offset for my e36, does anybody know what tyre sizes i should use on 7x17 fronts and 7.5x17 rears? Thanks for any help, cheers sc.

[scoobyc]

et47

[croyde]

Is there a table or formula somewhere for swapping wheel and tyre sizes on a E36?