TVI415

just wondering if this set up is safe for the porsche 4wd system, There's just too much pot holes where I live and i can't enjoy driving the car knowing that the front tires have so little sidewall,so Im thinking to just upsize the front tires to give me a little piece of mind,my car is a TTS,and getting a flat with the CL wheels is a hassle.the car has stock turboS CL wheels,i believe they are 8.5" front and 11" rear

Thanks