the only thing you really need to worry about with the 235/40s is a little bit of rubbing, and then only if you are really excercising your suspension...
i guess that applies to lowered cars. does it rub the fender lip? i only run 215 but i would like 5mm wheel spacers.
no, I was speaking of stock suspension. It does not appear to rub the fender lip (it's not a width issue, so much as a height issue), but does rub the plastic fender liner a wee bit, if your using up most of your suspension travel. If you lowered the car, I wouldnt bother with such big tires, they are going to rub in the front if your lowered.