FRS Fitment help !!
 

So my set up is looking like:

Konig Oversteer 18x8 +45mm offset
Eibach lowering springs (1 in )

Now will 245/40 square be okay all around ?

Or will 235/40 be the better option?

I do not want any poke in the front, I want it to be flush. I can add spacers to the back if needed.

Thanks :)

I would do a 225/40/18 on that wheel spec. If you had to do a 245, it would be a 245/35/18 as it is very close to OEM diameter, cheaper, and there are more options for that size. You will need spacers for it to be flush.