18" wheel tire fitment

Hi guys,I will be running konig hypergram 18X9.5 25+ backspace wheels on my cobra, what size of tire can I run upfront?

My old set up was a 17X9 with a 275/45R17, I would like to run something similar.

265/35r18 OR 275/35R18 If you have a taller rear

275/35/18s on mine on all 4 corners no issues.