[CSRomney]

The car puts out 305 HP at the wheels, I haven’t sorted the transmission gearing at this point. With the extra horsepower I’m expecting it should be able to handle a larger tire but I certainly want to consider any performance related issues.

I did a quick search of a few tire and wheel options and have a few questions about each. Keep in mind the 911 has turbo flares front and rear.

15 inch wheels:

195/70R15 (25.8 diameter).
Seems like this tire size would work in terms of size and performance without any problems. Are they a bit on the small size for turbo flares? I’m not sure what a good tire would be in this size.

205/70R15 (26.3 Diameter).
A quick searched showed Pirelli Scorpion ATR as a popular All Terrain option.

16 inch wheels:

BF Goodrich A/T K02 (27.1 diameter).
Is this tire going to be too large for a stock-ish suspension? I know this is a popular choice with the Safari crowd.

205/60R16 (Diameter 25.7)
Pirelli Scorpion ATR, closest all terrain I could find to stock wheel size.

215/60R16 (Diameter 26.1)
Yokohama GEOLANDAR A/T.

Any advice would be appreciated, I’m a novice and trying to learn as much as I can about this.