2018 Mk7.5 GTI Facelift with OZ HyperGT 18x8ET45 with Michelin Pilot Sport S4 225/40-18. Stock suspension. No spacers. Lots of clearance. After these photos were taken I installed DG lowering springs. Dropped about 1/2". Then I add 5mm spacers up front and 10mm spacers in the rear (all from ECS). I did the front "screw-mod" just in case. I have no rubbing. 235/40 will fit in the rear with the 10mm spacers. Up front I think I would remove the spacer and see how it cleared. Without the springs I think it would fit fine.
These photos are with the DG springs and spacers.
If you are looking to buy a set of the OZ 18" HyperGT, I have bigger wheels ordered and will be selling these. I actually have 5 (1 as a spare) and will be selling in a week or 2. PM me if interested.