If they have 225 then less likely to rub than with 235 on et45.
That said not every fitment does rub on the fronts with 8.5j et45/43, tyre brand does make a difference as the rim saver section of the tyre can be larger on some tyres than others.
An 8.5j rim would normally run a 245 tyre hence why many fit 225 and 235 as the small stretch can make all the difference.
fitting 8.5j is not a big deal and need not be complicated provided you factor in the effects of to much offset inboard and outboard and tyre width.
I was running 8.5j ET35 19" with 235 and it was spot on, changed to ET43 and probs appeared inboard on the fronts.
easy way to work it out is this.
As we know based on 18" 8j s-line fitment is ET43 with 235/40 tyre , changing to a higher number, so in this case 44 and upwards offset will move the rim closer to the suspension parts and away from the wheel arch lip.
Add in the width of the rim change , so 8.5j is approx. 12mm wider adds 6mm per side, you can see where the probs stem from a few mm here and and a few mm their all add up .
Spacing can counter this but then you are moving the rim outwards so allways a chance of rubbing outboard, moreso rears now.
Try this , turn your steering to full lock and get behind the wheel and see how close the tyre is now to the leg, try and get a finger between the sidewall and leg and you'll see what I mean.
