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My assumption is, you are worried if the offset you chose on your wheels could cause tire rub if you wanted a wider cross section tire? My next question would be, how low do you plan on going?? If you want tuck, you might have issues, as the 235 tire will have a slight stretch to it compared to the 245 tire....what you have to understand is you have an 8-1/2” width wheel that you want to put a 9-1/2” width tire on.....235 is best suited for your wheel...but that’s just me looking at the numbers....hopefully someone else can chime in on this!
How did it work out? Fitment told me that +40 was as low as you should go in offset ans 9.5 inch as wide as possible for these cars or else you will have to roll fenders.
Hey man, ran into similar issues as you did when researching what wheels to run on my wagon. Sorry for the long read..
Here is what I've learned and experienced:
My first set of wheels I ran 235/40's on a 19x8.5 +50 wheels with Tein Flex and I would slightly rub in the front under heavy cornering on the fender liner where the fender meets the bumper(It's a small area that protrudes to allow clearance for mounting hardware of the fender and bumper). In addition to a slight rub that went away(worked itself out lol), I distorted my fender coming off a really steep driveway while slightly turning(PDR fixed this for me, and I learned my lesson). After I hand pulled my front fenders ever so slightly with lots of heat - be very careful when rolling on these cars, the paint thickness and quality sucks(chips and crack easily). As for the rear, I had no issues with rubbing so I decided to test fit a 25mm spacer and had no issue with as well. Offset was pushed to a +25 with a 235 tire. Based off this and how soft Teins could be, I would recommend you go with the 235 in addition to a very slight front fender roll. The rear will be fine and eats up the tire/wheel combo, easily.
From experience and what I've seen posted on this forum, the front will not look good with your proposed setup due to the lack of natural camber these cars offer when being lowered. With this setup, you will gain +32mm of an outward push compared to stock. For context, the front natural camber at stock height is roughly -.5 and as you lower your car you'll maybe gain -.3, totaling -.8 degrees of negative camber upfront. This is not enough camber to eat up the offset of the proposed wheels. The front wheels will sit outside the fender roughly a 1inch and will not only rub but will look odd. The rears fair better. At stock height, camber is borderline out of spec from the factory. As you go lower, you will gain -1 to -1.5 degrees of camber.
Since I was in a similar situation wanting to run a 18x9 +31 all around, I decided to run a front camber kit. What helped me make the decision was a camber offset calculator. After some careful measuring, I decided to run -1.8 to -2 degrees of camber upfront. This added camber sucked in the wheel roughly 15mm bringing the offset of the wheel to a +46. This helped immensely and no added fender work was required from my hand pull with a 235 tire. In the rear, I left the camber alone and performed a slight role - probably could have gotten away with not rolling. Long story short, I have no rubbing what so ever, the car looks amazing, and I am very happy with the setup.
