I never do black wheels as you can't see them 75ft away, then they become round circles in pictures. Lets not forget they turn brown quickly from all the brake dust. Not fun spending $6k and not be able to see them
I never track the car so I didn't want to go wider than 8.5" in the front. Car is too small for 9 or 10" wheels up front unless you're tacking it all the time. I think if you're track the car a lot you should have a set of wheels & tires just for the track with Cup2's. A 10" at front would track on the highway side to side pending how bad the roads are, you would have to stay away from the truck lane for sure. Never had a problem with the 8.5"
Now the rear is a different story with 11" wide, it just plants itself the faster you go. The SPASM (20mm) suspension works great.
I was planning on going with 305/30 in the future because with my setup I was able to break the tires. Having 405 to 410 rear wheel hp is amazing.
Let me be clear, I have always said the 718 Boxster S is the underdog in this line up. I didn't need all the extra suede nor the extra 15hp for all the extra money a GTS cost (3rd radiator only good extra feature). For me it would be an S or jump to GT4
Stock wheel setup was 19" with 235/35 & 265/30
Now I have a 2018 Porsche 911 Carrera S Cabriolet, this car is totally different from a Boxster. I'll be setting up this car to be much more aggressive
Here is a pic of the Boxster in low light, look how nice the wheels pop