theres people here that run NSX wheels...which are 17's in the rear and 16's in the front

 

just make sure the diameter of the wheels are similar or you adjust your suspension ride height to compensate . You don't want to throw off your center of mass or you will change the handling.

 

^that redhead is hypnotic I was staring at that thing for so long

 

my cyber girl friend

 

There should not be any problem if you run the propper sidewall height. Example:
If stock fronts are 215/45R16, get 215/40R17.
If stock rears are 245/40R16, maybe a 245/30R18 will have the same overall diameter.
Now, finding a matching 17/18 inch rim set with the right offsets And width, that's a challenge.

 

wider tires is always better. i would go for the widest tires i could get. i would recommend

Front: 245/40/17

Rear: 275/35/18 (require high offset)

if you get +73 offset for the rear, you can fit 285/35/18 tires