I need to buy some new tires and I would really like to get the Michelin Pilot Sport 2 tires for my Ferrari 360. However they do not come in the 360 stock size on the front which is 215/45 18. The PS 2 is 225/45 18.
Stock 360
Front 215/45 - 18
Rear 275/40 - 18
If I bump up the front to PS2, what about the rear.
Front 225/45 ZR 18
Rear 285/40 ZR 18 ?

Otherwise I am also considering the Yokahama Advan in the stock sizes.
Anyone with PS 2 tires or info on the corresponding rear wheel bump up.
thanks in advance.

 

Here is a tire calculator which has helped to configure the front to rear size ratio, height, etc.
http://www.miata.net/garage/tirecalc.html
After all is said in done, I could not work the PS 2 tires with the sizes they have available. The standard Pilot Sport is the corect size and rates slightly better then the Potenza RE050A and S-02A. According to tiretrack testing the Yokohama Advan is the best offered in the stock sizes.