I have 1,6 Vogtland, Koni adjustable shocks and Adco 1 3/8" rear sway bar . Wheel is the original 215/70x15. New wheel will be 235/55x17. They are only 7 mm (~1/4") bigger than the original. Hope to have the new wheel mounted next weekend.
The roads around here are not that good, but it functions perfect with no problems. I have the Koni at the hard in front and soft in rear.
This winter everything in the rear driveline/suspension was up graded and next winter will be the front.
Around 15 - 1.6 drop will take care of your problem