Dave Kegel:
I can only tell you what I know, based on 17" rims. I think it would still apply to an 18" or 19" rim. A 17 x 8" rim with a 40mm offset and 235 tires does not rub (in the rear), but it's close. The same rim with a 245mm tire does rub the rear strut. A 7.5" 42mm offset rim with a 245" tire also rubs the strut. They don't rub much in either case and only during aggressive cornering, but they rub nonetheless. So... I would be surprised if a 45mm offset 8" wide rim did not rub with a 235" tire. 40mm is the ideal offset. 35mm will fit in the front (but stick out quite a bit) and rub against the rear fenders on a Gen1, probably a Gen2 as well. One last thing... There's also the very real possibility that a 45mm rim would cause the inside of the front tires to rub against the top bolt of the sway bar endlink.
Dave Kegel