Questions about going low.

[AltimasPrime08]

Alright everyone I have a 2008 a/c 3.5L V6. I recently ordered wheels and Megan EZ streets are my next big purchase. My coupe currently has 17x8 +40 wheels on it with a 225/55/17. The wheels I ordered are 18x8 +40 and tires are going to be a 235/45/18. Looking to see how low I can drop it without having to roll my front fenders, If you guys think it's needed than just let me know. I dont want my car to be slammed by any means. I'd like a nice flush look, I dont want my fenders to cover my wheel/tire at all but I want them to meet up fairly close. Hopefully you all can help. Pictures below! Thank you.

[SanoSuKe]

You won't have to roll your fenders if you're not going really low. I'd just make sure that everything is fine and not rubbing after lowering the car. with that offset and tire sizes, I highly doubt you'll rub.