I have 235/40-17. They don't scrub on anything, BUT, I'm hoping you are aware about fact that the more width you have in your tires, the bigger restriction they are. For example, I have 185/60/15 winter tires and I can notice a big difference in performance (acceleration) with these tyres. Though they are bullshite when it comes to cornering, but I just wanted you to think about this too. I'm saying that it is possible to put 235 tires on 17" wheels, maybe even 245, depending on the off set of your rims... Just think about what it makes to your acceleration too.
C ya bro
Mici