235's are kinda close to pushing it. I've heard of people doing it, but 225 is a much more common size for our cars. I'd say if you can find a way to measure the clearance at the range of movement up front and the clearance in the rear, and you have at least 1cm of clearance then 235's should be good...you only need another .5cm in reality. But keep in mind that one tire brand and model in a 235 isn't always the same as a different brand and model's 235...there can be variation enough to have a problem if it's close, that's why I say at least 1cm of clearance.

Good luck!