Hi, newb here
 

My wife has a base 2013 GS with square 18 stock wheels. I am planning to sell my TSX and the wheels on the car unless they fit her car. I searched and have come across limited information. I take that my wheel setup of 18x9.5+40 square would not fit properly on her GS? I was planning to also put some thicker tires on the wheels if they fit. Perhaps 255? Of course this is if the wheel specs are proper fit for her daily driving. Any verification of no they wont fit will confirm what I feel is the answer. Hopefully someone is rolling on this wheel size lol. Thank you in advance.

Nah we're rollin' 22s+ here. :D

Here try ur fitment: https://www.willtheyfit.com/

U just need to make sure it clears the struts and brake calipers and the bolt patterns are the same.

If your TSX bolt pattern is 114.3 x 5, it may fit the GS. But I don't recommend 255 up front, it will rub for sure. 245 all around is best for a square setup.

Thanks for all the insight. The calculator told me the wheel will be 14.1mm closer to the suspension strut. So its safe to assume thats not too bad with full locked turn? I wanted to lower the car a little also with some tanabe springs if I put these wheels on the car.