Interesting. I am currently running 18x8.5 and 18x10 with Michelin Pilot Sport Cup 225/40 & 265/35.
The car is a dedicated racing car 2001 Boxster S which has been remapped. I will have to dyno the car again, but hope to be close to 300BHP. I am also running with a 2.5 5 speed gearbox with an LSD for better gearing.
Like I said above, I will be putting on the AIR Boxster rear fender flares which gives an extra 2" so could maybe even go up to a 18X11.5 or 18x12 rear wheel. I would have liked to get the current 18x10 that I am running in the rear to fit in the front as then I will only need to get new rear wheels
