235/50/18 .. getting a deal on them will they fit fine etc. stock se setup

 

look up wheel calculators

 

Your new size will be a bit taller and less wider then the stock size. Normally people want to go LESS taller and more wider.... Increased footprint, stiffer sidewalls may lead to better handling but since your going in the other direction you might experience the opposite but your not making much of a difference so the outcome shouldn't be too different although your speedometer will be off by 1.5mph, the tire will fit the wheel. Most people here and myself wouldn't do it but you think about how "good" this deal is and if its worth it to you.

If you want a more indepth answer on if its worth it or not post the deal your getting.

 

They'll fit great.