Tires For Boxster S

[NoElise]

I checked with TireRack and although they don't make a PS2 in 205/50-17, a 225/45-17 will fit without any mods. Can anyone confirm this? I am not planning on driving much during the snow, but thought I could take advantage of the longer tread life of the A/S tires without sacrificing much performance. How much performance would I lose over the PS2s? Also, I don't plan on tracking the car, but I will put it though it's paces on the street