wheel offset and master cyl dia

Would anybody mind letting me know what offset is required on front and rear 18" wheels on a GTA.
Does anybody know the brake master cylinder size on a GTA and A610

GTA master cylider bore is 23.8 dia
A610 bore is 25.4
Still need wheel ofsets

Try the site's search facility, I'm sure offsets have been mentioned before on here.

edit and add.-----------------------------------

Arhhh yes, here you go, an interseting thread too.

http://www.renaultalpineownersclub.com/ ... ght=offset

GTA master cylider bore is 23.8 dia
A610 bore is 25.4
Still need wheel ofsets

Its more like if you tell me the width rims you want to run, I can tell you the offsets you need, as the standard ones are abit weaksauce....