9J wheels on megane 225, what offset?

[BlueNGT]

I want to get some 9J wheels for my 225 F1.

I like the 2Forge ZF1 wheel, forged, light and simple.

What offset would be suitable with a 9J wheel (18 inch)?

I have seen that runs 9's and I believe the offset is 52 or 54, however that car runs a MK3 rear beam so he can run some rear camber.

Thanks in advance

[BlueNGT]

Thanks for this but as far as I can see it only provides the standard wheel sizing/offset.

I want to go up to 9 inch width.