Hi,
I currently have Michelin PSS in the 18" stock sizes for the 135i:
215/40ZR
245/35ZR-18
It looks like these sizes are not available at all for the PS4. This page (click on sizing) shoes the 18" sizes currently available:
https://www.tirerack.com/tires/tires...Pilot+Sport+4S
Is there any combination of these that work? What would be the best combo?